Some types of sentences can be changed -

1. If there is only / alone, there is none but. [In person]
2. If there is only / alone, there is nothing but. [In case of objects]
3. only if not more less than is. [Refers to numbers]
4. Both_____and is not only_____but also.
5. If there is every there is no + but + the rest.
6. If there is simple affirmatve, not + affirmative is the opposite word.
7. Always have the opposite word of never + affirmative instead.
8. If too.....to-
     Sub + verb + too instead of so + too The next adjective / adverb + that + sub + can / could not + to the next part.

9. As ....... as if -

     Not less instead of 1st as
     Than instead of 2nd as

10.Sometimes is no / not + always instead.
11. If there is many, it is not a few instead.
12. If there are a few, not many instead.
13. If there is a little, not much instead.
14. If there is much, sit a not a little instead.

Rule 1: None but sits at the beginning of the sentence instead of Only or alone. There is no change.
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: In the case of objects, nothing but sits instead of only. However, in case of age or number, instead of only, not more than sits.

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: If there is a must in the affirmative sentence, when it is negative, instead of must, can not but / can not help. However, ing can be added to the verb after can not help.
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: To make every negative, there is no instead of every + the word after every sits + but + the rest of the given sentence.
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: To make the added sentence as soon as Negative-
As soon as no sooner had will sit in place + the master of the given sentence will sit + he will sit in v3 of the main verb of the sentence + he will sit in the rest of the sentence + than + the second sentence will sit.
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: When making an affirmative sentence negative, you have to put the negative form of the affirmative word in that sentence. And you have to put not before that negative. Everything else is fine.
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: If you want to make the affirmative sentence with Always negative, never use Always instead. The negative form of the word affirmative is to be placed.
Affirmative: He was always punctual.

Negative: He was never late.
 

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

Rule 7: To Negative Affirmative Sentence with Superlative Degree -
No other + superlative next part + verb + as + positive form of superlative degree + as + subject of the given sentence.
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: To make a comparative degree with any other / than all other negative -
No other + any other / all other's next part sit + given verb + so / as sit + positive form of comparative degree + as + given subject of given sentence.
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: To make a comparative degree with Than Negative -
The last part of than sits first + verb (according to tense and person) + not + so / as + positive form of comparative degree + as + subject of given sentence.
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: To make a positive degree with As .... as negative -
The first as is not less than the last as is replaced by than.
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: To make a sentence with Less ... than Negative -
Less will be replaced by not as and than will be replaced by as.
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: To make a sentence with Too ..... to Negative -
Too sits in place of soo + adjective / adverb after Too sits + that sits + subject sits in panura. + according to the tense can not / could not + the next part of the given to sit.
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. Assertive Sentence with auxiliary verb -
    To be verb + n’t + sub + rest +?
2. If the sentence is negative -
       To be verb + sub + the rest +? [Negative word must be omitted. ]
3. If the present / past is indefinite and assertive without the helper verb -
Don’t / dosen’t / didn’t + present + the rest of the sub + verb?
4. Assertive has do not / did not / dose not, but not is omitted instead of do / did / does.
5.Never is ever.
   If there is nothing, anything happens.

Rule 1: If the sentence is affirmative when converting the assertive sentence with the auxiliary verb into interrogative without changing the meaning - Auxiliary verb + n’t + subject + left +?

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: Negative semantic assertive sentence with auxiliary verb gets negative when converting to interrogative. And the auxiliary verb sits first. At the end sits the question mark.
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: When converting to Assertive sentence interrogative without auxiliary verb -
According to the subject and tense don’t / didn’t / doesn’t sit + subject + v1 + the next part of the verb +?
 

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: If there is never in the assertive sentence, there is ever and if there is nothing, there is anything. If there is no auxiliary verb, it has to be brought first according to the subject and tense. At the end sits the question mark.
 

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: When converting Assertive sentence with Everybody / everyone / all to interrogative, who sits instead of Everybody / everyone / all + according to Subject and tense don’t / didn’t / doesn’t sit + next part of verb + v1 +?
 

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: When converting to Nobody / none / no one interrogative -
Nobody / none / no one instead of who sits + the rest +?
 

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 to Assertive -
First sit the subject + verb + a / an + very / great + adjective + the rest.
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 Exclamatory to Assertive -
Instead of Hurrah it is a matter of joy + the next part of Hurrah.
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 the exclamatory sentence starts with If the rule to assert the sentence -
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: If you want to add Exclamatory to Assertive first -
Subject + wish + re-subject sit + had + the rest.
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.
 

Changing Sentence Assertive to Exclamatory with example

Rule 1: first what or how + adjective + subject + verb + the rest (if any) +!
Note: What a sits if there is a before the adjective and how sits if there is no a.
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: If there is a wish in the assertive sentence, if / had sits at the beginning of the exclamatory.
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: If, had, o that, oh that, etc. sit at the beginning of the wish / desire exclamatory sentence in the assertive sentence.
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 + comparative form of Superlative + than any other + given sentence rest.
Superlative: He is the best player in the team.
Comparative: He is better than any other player in the team.
Note: If all of, instead of All of than all other.
Superlative: He is the best of all men.
Comparative: He is better than all other man.
Rule 2: One of the rules to convert the combined Superlative Degree to Comparative Degree
Subject + verb + superlative comparative form + than most other + given sentence rest.
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 positive degree to convert to Comparative Degree
From the last subject of the given sentence + verb + comparative form of positive degree + than any other + no other to before the verb.
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: Rules for converting very few positive degrees to comparative degrees
From the last subject of the given sentence + verb + comparative form of positive degree + than most other + no other to before the verb.
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: Rules for converting a positive degree with As …… as to a Comparative Degree
The last subject of the given sentence + verb + not + comparative form of positive degree + than + the first subject of the given sentence.
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's superlative form + other's next part.
Comparative: He is better than any other player in the team.
Superlative: He is the best player in the team.

     Note - If there is a plural noun after other, superlative is followed by of all.

Comparative: He is bigger than all boys.
Superlative: He is the tallest of all boys.
 
Rule 2: How to convert Comparative to Superlative with most other / than few other:
Subject + verb + one of the + superlative form of comparative degree + most other / few other next part.
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 positive degree to convert to superlative degree
Subject + verb + the + positive's superlative form + no other at the end of the given sentence and the middle part of the verb.
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 in the society is as good as he.
Superlative: He is the best man in the society.
Rule 2: Rules for converting very few positive degrees into superlative degrees
Subject at the end of the given sentence + verb + one of the + positive's superlative form + very few after the middle part of the verb.
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.