কোন কোন ধরনের বাক্য পরিবর্তন করা যেতে পারে -

1. only/alone  থাকলে none but হয় । [বাক্তির ক্ষেত্রে ]
2. only/alone  থাকলে nothing but হয় । [বস্তুর ক্ষেত্রে]
3. only  থাকলে not more less than হয় । [সংখ্যা বোঝালে ]
4. Both_____and   থাকলে not only_____but also হয় ।
5. every থাকলে there is no + but + বাকি অংশ ।
6. Simple affirmatve থাকলে not + affirmative word এর opposite word হয় ।
7. Always থাকলে এর পরিবর্তে never + affirmative এর opposite word হয় ।
8. too___to থাকলে-
    Sub+verb+too পরিবর্তে so + too পরবর্তী adjective/adverb+ that + sub+ can/could not + to পরবর্তী অংশ ।
9.As____as থাকলে – 

10.Sometimes থাকলে এর পরিবর্তে no/not +always হয় ।
11. Many থাকলে এর পরিবর্তে not a few হয় ।
12. A few থাকলে পরিবর্তে not many বসে ।
13. A little থাকলে পরিবর্তে not much বসে .
14.much থাকলে  পরিবর্তে not a little বসে .

Rule 1: Only বা alone এর পরিবর্তে উত্তর বাক্যের শুরুতে None but বসে। আর কোন পরিবর্তন হয়না ।
Affirmative: Only he can play good cricket.
Negative: None but he can play good cricket.
 

Affirmative: Only the science students can apply for the post.
Negative: None but the science students can apply for the post.
 

Affirmative: Only they can do the work.
Negative: None but they can do the work.

Note: বস্তুর ক্ষেত্রে only এর পরিবর্তে nothing but বসে। তবে বয়সের ক্ষেত্রে বা সংখ্যার ক্ষেত্রে only এর পরিবর্তে not more than বসে।

Affirmative: He is only four.
Negative: He is not more than four.
 

Affirmative: They have only two cars.
Negative: They have not more than two cars.

Rule 2: Affirmative sentence এ must থাকলে negative করার সময় must এর পরিবর্তে can not but/ can not help বসে। তবে can not help এর পরে যে verb থাকে তার সাথে ing যুক্ত করতে হয়।
Affirmative: you must yield to your fate.
Negative: You can not but yield to your fate.
 

Affirmative: We must obey our parents.
Negative: we can not but obey our parents.
 

Affirmative: you must care them.
Negative: You can not help caring them.
 

Rule 3: Every কে Negative করতে হলে every এর পরিবর্তে There is no বসে + every এর পরের শব্দটি বসে + but + প্রদত্ত sentence এর বাকী অংশ ।
Affirmative: Everyone hates a terrorist.
Negative: There is no one but hates a terrorist.
 

Affirmative: Everybody fears a lion.
Negative: There is no body but hates a liar.
 

Rule 4: As soon as যুক্ত sentence কে Negative করতে হলে-
As soon as এর জায়গায় no sooner had বসবে + প্রদত্ত Sentence এর কর্তা বসে + সে Sentence এর মূল verb এর v3 বসে + সে sentence বাকী অংশ বসে + than + দ্বিতীয় বাক্য বসে।
Affirmative: As soon as he he saw the tiger, he ran away.
Negative: No sooner had he seen the Tiger than he ran away.
 

Affirmative: No sooner had the boy saw the police, he ran away.
Negative: As soon as the boy seen the police than he ran away.
 

Rule 5: Affirmative sentence কে Negative করার সময় উক্ত sentence এর Affirmative শব্দটির Negative রূপ বসাতে হয়। এবং উক্ত Negative এর পূর্বে not বসাতে হয়। বাকী সব থিক থাকে।
Affirmative: He is a good man.
Negative: He is not a bad man.
 

Affirmative: Rakib is an honest boy.
Negative: Rakib is not a dishonest boy.
 

Affirmative: This was an extra-ordinary ship.
Negative: This was not an ordinary ship.
 

Rule 6: Always যুক্ত Affirmative sentence কে Negative করতে হলে Always এর পরিবর্তে never বসে। Affirmative শব্দটির Negative রূপ বসাতে হয় ।
Affirmative: He was always punctual.

Negative: He was never late.
 

Affirmative: I always tell truth.
Negative: I never tell lie.
 

Rule 7: Superlative degree যুক্ত Affirmative sentence কে Negative করতে হলে –
No other + superlative এর পরের অংশ + verb + as + superlative degree এর positive form + as + প্রদত্ত sentence এর subject.
Affirmative: He is the best batsman in the team.
Negative: No other batsman in the team is as good as he.
 

Affirmative: You are the best boy in the class.
Negative: No other boy in the class is as good as you.
 

Rule 8: Than any other/than all other যুক্ত comparative degree কে Negative করতে হলে –
No other + any other/all other এর পরের অংশ বসে + প্রদত্ত verb + so/as বসে + comparative degree এর positive form + as + প্রদত্ত sentence এর subject.
Affirmative: He is better than any other boy in the class.
Negative: No other boy in the class is as good as he.
 

Affirmative: Dhaka is bigger than all other cities in Bangladesh.
Negative: No other city in Bangladesh is as big as Dhaka.
 

Rule 9: Than যুক্ত comparative degree কে Negative করতে হলে –
Than এর শেষের অংশ প্রথমে বসে + verb (tense ও person অনুযায়ী) + not + so/as + comparative degree এর positive form + as + প্রদত্ত sentence এর subject.
Affirmative: He is stronger than you.
Negative: You are not as/so strong as he.
 

Affirmative: I am taller than you.
Negative: You are not as tall as me.
 

Rule 10: As....as যুক্ত positive degree কে Negative করতে হলে –
প্রথম as এর পরিবর্তে not less শেষ as এর পরিবর্তে than বসে।
Affirmative: Robi and Rahat were as strong as Rakib.
Negative: Robi and Rahat were not less strong than Rakib.
 

Affirmative: He is as good as you.
Negative: He is not less good than you.
 

Rule 11: Less...than যুক্ত sentence কে Negative করতে হলে –
Less এর জায়গায় not as বসবে এবং than এর জায়গায় as বসবে।
Affirmative: He is less ugly than you said.
Negative: He is not as ugly as you said.
 

Affirmative: You are less good than he said.
Negative: You are not as good as he said.

Rule 12: Too.....to যুক্ত sentence কে Negative করতে হলে –
Too এর জায়গায় so বসে + Too এর পরের adjective/adverb বসে + that বসে + পনুরায় subject বসে। + tense অনুযায়ী can not/could not + প্রদত্ত to এর পরের অংশ বসে।
Affirmative: He is too weak to walk.
Negative: He is so weak that he can not walk.

Affirmative: The sum was too difficult for me to work out.
Negative: The sum was so difficult for me that I could not work out. 

1.সাহায্যকারী verb যুক্ত Assertive Sentence –
   To be verb + n’t + sub + বাকি অংশ + ?
২. বাক্যটি negative হলে –
      To be verb + sub + বাকি অংশ + ? [Negative word বাদ দিতে হবে । ]
3.সাহায্যকারী Verb বিহীন present/past indefinite এবং assertive হলে –
Don’t /dosen’t/ didn’t + sub + verb এর present + বাকি অংশ + ?
4. Assertive এ do not/ did not/ dose not থাকলে পরিবর্তে not বাদ যায় do/did/does বসে ।
5.Never থাকলে ever হয় ।
  Nothing থাকলে anything হয় ।

Rule 1: অর্থের পরিবর্তন না করে সাহায্যকারী verb যুক্ত Assertive sentence কে interrogative এ রুপান্তর করার সময় sentence টি যদি affirmative হয় তাহলে – Auxiliary verb + n’t + subject + বাকী + ?

Note- assertive এ will, can, shall, am থাকলে interrogative এ রুপান্তর করার সময় won’t, can’t, shan’t, ain’t হয়

Assertive: He is in the school.
Interrogative: Isn’t he in the school?
 

Assertive: You can do the work.
Interrogative: Can’t you do the work?
 

Rule 2: Auxiliary verb যুক্ত negative অর্থবোধক Assertive sentence কে interrogative এ রুপান্তর করার সময় negative উঠে যায়। এবং সাহায্যকারী verb প্রথমে বসে। শেষে প্রশ্নবোধক চিহ্ন বসে।
Assertive: He is not in the school.
Interrogative: Is he in the school?
 

Assertive: I shall not go to Dhaka tomorrow.
Interrogative: Shall I go to Dhaka tomorrow?
 

Rule 3:Auxiliary verb বিহীন Assertive sentence interrogative এ রুপান্তর করার সময় –
Subject and tense অনুযায়ী don’t/ didn’t/ doesn’t বসে + subject + v1 + verb এর পরের অংশ +?
 

Assertive: He played good football.
Interrogative: Didn’t he play good football?
 

Assertive: He likes ice-cream.
Interrogative: Doesn’t he like ice-cream?
 

Rule 4:Assertive sentence এ never থাকলে ever হয় এবং nothing থাকলে anything হয়। auxiliary verb না থাকলে Subject and tense অনুযায়ী প্রথমে আনতে হয়। শেষে প্রশ্নবোধক চিহ্ন বসে।
 

Assertive: You never play football.
Interrogative: Do you ever play football?
 

Assertive: I have nothing to do?
Interrogative: Have I anything to do?

Note: Assertive sentence এর subject এ যদি nothing থাকে তাহলে nothing এর জায়গায় what বসে।

Assertive: Nothing can ruin him.
Interrogative: what can ruin him?
 

Rule 5:Everybody/ everyone/all যুক্ত Assertive sentence কে interrogative এ রুপান্তর করার সময় Everybody/ everyone/all এর পরিবর্তে who বসে + Subject and tense অনুযায়ী don’t/ didn’t/ doesn’t বসে + v1 + verb এর পরের অংশ +?
 

Assertive: Everybody wants to be win.
Interrogative: Who doesn’t wish to be win?
 

Assertive: Everybody/All loves flowers.
Interrogative: Who doesn’t love flower?
 

Rule 6:Nobody/none/no one interrogative এ রুপান্তর করার সময় –
Nobody/none/no one এর পরিবর্তে who বসে + বাকী অংশ + ?
 

Assertive: Nobody could ever count my love for you.
Interrogative: Who could ever count my love for you?
 

Assertive: No one can beat him.
Interrogative: Who can beat him?

 

Changing Sentence Exclamatory To Assertive with example

Rule 1:Exclamatory কে Assertive এ করতে হলে -
প্রথমে subject বসে + verb + a/an + very/great + adjective + বাকী অংশ।
Exclamatory: What a nice flower it is!
Assertive: It is a very nice flower.
 

Exclamatory: What a genius student he is!
Assertive: He is a very genius student.
 

Rule 2: Hurrah যুক্ত Exclamatory কে Assertive এ করতে হলে –
Hurrah এর পরিবর্তে it is a matter of joy + Hurrah এর পরের অংশ।
Exclamatory: Hurrah! We have won the game.
Assertive: It is a matter of joy that we have won the game.
 

Exclamatory: hurrah! I got the first prize.
Assertive: It is a matter of joy that I have got the first prize.
 

Rule 3:If দ্বারা exclamatory sentence শুরু হলে উক্ত sentence কে Assertive করার নিয়ম –
Exclamatory: If I were a player!
Assertive: I wish I were a player.
 

Exclamatory: If I could fly!
Assertive: I wish I could fly

Rule 4:প্রথমে had যুক্ত Exclamatory কে Assertive এ করতে হলে –
Subject + wish + পুনরায় subject বসে + had + বাকী অংশ।
Exclamatory: Had I the pairs of birds!
Assertive: I wish I had the pairs of birds.
 

Exclamatory: Had I been a king!
Assertive: I wish I had been a king.
 

Rule 6:প্রথমে Alas যুক্ত Exclamatory কে Assertive এ করতে হলে –
Alas এর পরিবর্তে it is a matter of sorrow that + alas এর পরের অংশ।
Exclamatory: Alas! We lost the game!
Assertive: It is a matter of sorrow that we lost the game.
 

Exclamatory: Alas! He failed in the examination!
Assertive: It is a matter of sorrow that he failed in the examination.
 

Rule 7:প্রথমে Fie যুক্ত Exclamatory কে Assertive এ করতে হলে –
Fie এর পরিবর্তে it is shameful that + fie এর পরের অংশ।
Exclamatory: Fie! He can not tolerate the poor.
Assertive: It is shameful that he can not tolerate the poor.
 

Exclamatory: Fie! He don’t respect seniors.
Assertive: It is shameful that he don’t respect seniors.
 

Rule 8:প্রথমে Would that যুক্ত Exclamatory কে Assertive এ করতে হলে –
প্রদত্ত subject + wish + Would that এর পরের অংশ।
Exclamatory: Would that I could be a player!
Assertive: I wish I could be a player.
 

Exclamatory: Would that I could be a child again!
Assertive: I wish I could be a child again.
 

Rule 9:প্রথমে o that যুক্ত Exclamatory কে Assertive এ করতে হলে –
Subject + wish + o that এর পরের অংশ।
Exclamatory: O that you were a cricketer!
Assertive: I wish you were a cricketer.
 

Exclamatory: O that i were a poet.
Assertive: I wish I were a poet.

Changing Sentence Assertive to Exclamatory with example

Rule 1:প্রথমে what বা how বসে + adjective বসে + subject + verb + বাকী অংশ( যদি থাকে) + !
Note: adjective এর পূর্বে a থাকলে what a বসে এবং a না থাকলে how বসে ।
Assertive: It is a very beautiful place.
Exclamatory: What a beautiful place it is!
 

Assertive: The man is very honest.
Exclamatory: How honest the man is!
 

Rule 2:Assertive sentence এ wish থাকলে Exclamatory করার সময় শুরুতে if/had বসে।
Assertive: I wish I had the wings of a bird.
Exclamatory: Had I the wings of bird!
Or, If I had the wings of a bird!
 

Assertive: I wish I were a king.
Exclamatory: If I were a king!
 

Rule 3:Assertive sentence এ wish/desire Exclamatory sentence করার সময় এর শুরুতে If, had, o that, oh that ইত্যাদি বসে।
Assertive: I wish I were a player.
Exclamatory: If I were a player!
 

Assertive: I desire I were young again.
Exclamatory: Oh that I were young again.
 

Changes of Degree

Superlative To Comparative

Rule 1:Subject + verb + Superlative এর comparative form + than any other + প্রদত্ত sentence বাকী অংশ।
Superlative: He is the best player in the team.
Comparative: He is better than any other player in the team.
Note: All of থাকলে All of এর পরিবর্তে than all other বসে।
Superlative: He is the best of all men.
Comparative: He is better than all other man.
Rule 2:One of the যুক্ত Superlative Degree কে Comparative Degree তে রুপান্তর করার নিয়মঃ
Subject + verb + Superlative এর comparative form + than most other + প্রদত্ত sentence বাকী অংশ।
Superlative: Kibria is one of the best players in the team.
Comparative: Kibria is better than most other players in the team.
Superlative: Canada is one of the coldest countries in the world.
Comparative: Canada is colder than most other countries in the world.

Positive To Comparative

Rule 1:No other যুক্ত positive Degree কে Comparative Degree তে রুপান্তর করার নিয়মঃ
প্রদত্ত sentence এর শেষের subject + verb + positive degree এর comparative form + than any other + no other এর পর থেকে verb এর পূর্ব পর্যন্ত।
Positive: No other player in the team is as best as he.
Comparative: He is better than any other player in the team.
Positive: No other country in the world is so/as cold as Canada.
Comparative: Canada is colder than any other country in the world.

Rule 2:Very few যুক্ত positive Degree কে Comparative Degree তে রুপান্তর করার নিয়মঃ
প্রদত্ত sentence এর শেষের subject + verb + positive degree এর comparative form + than most other + no other এর পর থেকে verb এর পূর্ব পর্যন্ত।
Positive: Very few students are so good as Lablu.
Comparative: Lablu is better than most other students.
Positive: Very few metals are so costly as gold.
Comparative: Gold is costlier than most other metals.
Rule 3:As……as যুক্ত positive Degree কে Comparative Degree তে রুপান্তর করার নিয়মঃ
প্রদত্ত sentence এর শেষের subject + verb + not + positive degree এর comparative form + than + প্রদত্ত sentence এর প্রথম subject।
Positive: He is as good as his brother
Comparative: His brother is not better than he.

Comparative To Superlative

Rule 1:Subject + verb + the + Comparative এর superlative form + other এর পরের অংশ।
Comparative: He is better than any other player in the team.
Superlative: He is the best player in the team.

Note – other এর পর plural noun থাকলে superlative এর পরে of all বসে ।

Comparative: He is bigger than of all boys.
Superlative: He is the tallest of all boys.
 

Rule 2:Than most other/than few other যুক্ত Comparative কে Superlative এ রুপান্তর করার নিয়ম:
Subject + verb + one of the + Comparative degree এর superlative form + most other/few other এর পরের অংশ।
Comparative: Vatican City is smaller than most other countries in the world.
Superlative: Vatican City is one of the smallest countries in the world.
Comparative: Dhaka is bigger than most other cities in Bangladesh.
Superlative: Dhaka is one of the biggest cities in Bangladesh.
 

Positive To Superlative

Rule 1:No other যুক্ত positive degree কে superlative degree তে রুপান্তর করার নিয়মঃ
প্রদত্ত sentence এর শেষের Subject + verb + the + positive এর superlative form + no other এর পর থেকে verb এর মাঝের অংশ।
Positive: No other player in the team is as good as Raju.
Superlative: Raju is the best player in the team.
Positive: No other man man in the society is as good as he.
Superlative: He is the best man in the society.
Rule 2:Very few যুক্ত positive degree কে superlative degree তে রুপান্তর করার নিয়মঃ
প্রদত্ত sentence এর শেষের Subject + verb + one of the + positive এর superlative form + very few এর পর থেকে verb এর মাঝের অংশ।
Positive: Very few men in the village are as tall as kobir.
Superlative: Kobir is one of the tallest men in the village.
Positive: Very few people in the country are as good as Rakib
Superlative: Rakib is one of the best people in the country.