Affirmative to Negative:
 Rule-4 : Affirmative sentence- always থাকলেএর পরিবর্তে never এবং key wordটির বিপরীতার্থক (antonym) ব্যবহার করে negative করতে হয়।
Example: Affirmative : We always remember the martyrs.
Negative: We never forget the martyrs.
Affirmative: We are always regular in our duties.
Negative: We are never irregular in our duties.

Rule 5: As soon as-কে negative করতে হলে প্রথমে as soon as-এর পরিবর্তে no sooner had বসে। এরপর সে sentence-এর subject বসবে, verb-এর participle বসে এবং sentence-এর বাকি অংশ বসবে। তারপর than এবং সবশেষে দ্বিতীয় sentenceটি বসবে।
Example: Affirmative : As soon as the thief saw the police, he ran away.
Negative: No sooner had the thief seen the police than he ran away.

Rule 6: Affirmative sentence- too…to থাকলে negative করার সময় too…to-এর পরিবর্তে so…that দিয়ে পরিবর্তন করতে হবে।
Example: Affirmative : He is too dishonest to speak the truth.
Negative: He is so dishonest that he cannot speak the truth.
Affirmative : They were too nice to use just at present.
Negative: They were so nice that they could not be used just at present.

Rule 7: As…as যুক্ত affirmative sentence-কে negative করতে হলে প্রথমে as-এর জায়গায় not less এবং পরের as-এর জায়গায় than বসে।
Example: Affirmative : Rina’s knowledge in English is as sound as Shova.
Negative: Rina’s knowledge in English is not less sound than Shova.

Rule 8: ‘For ever’ কিংবা ‘For good’ যুক্ত বাক্যগুলোকে negative করতে হলে never এবং verb-কে বাক্যের প্রয়োজন অনুযায়ী পরিবর্তন করতে হবে।
Example: Affirmative : He has left the tuition for good.
Negative: He will never join the tuition again.
Affirmative: Rana has given up gambling for ever.
Negative: Rana will never play gambling again.

Rule 9 : Continuous tense যুক্ত বাক্যগুলোকে negative করতে হলে it is not that বসবে এবং পরবর্তী অংশ negative করতে হবে।
Example: Affirmative : He is going to the function.
Negative: It is not that he is not going to the function.
Affirmative: I am digging the field.
Negative: It is not that I am not digging the field.

Rules 10 : ‘Be verb’ যুক্ত affirmative adjective থাকলে complement হিসেবে কাজ করে।  ধরনের affirmative sentence-কে negative করতে হলে not বসিয়ে বিপরীত adjective বসাতে হবে।
Example : Affirmative : Man is mortal.
Negative : Man is not immortal.
Affirmative : It is an easy term.
Negative : It is not a complex term.
Assertive sentence-
কে interrogative এবং exclamatory sentence- পরিণত করার জন্য আমি কতগুলো নিয়ম উপস্থাপন করেছি এবং প্রতিটি নিয়মের সাপেক্ষে example  exercise দিয়েছিযাতে তোমরা সহজে নিয়মগুলো আয়ত্ত করে সঠিকভাবে প্রয়োগ করতে পারো।

Assertive to Interrogative:
Rule 1 : অর্থের পরিবর্তন না ঘটিয়ে assertive sentence-কে interrogative sentence- পরিবর্তন করার নিয়ম: (i) ‘হ্যাঁ’-বোধক assertive sentence-কে না’-বোধক interrogative sentence- পরিবর্তন করে interrogative sentence গঠন করা যায়।
Example : As. : Smoking is a bad habit
Int. : Isn’t smoking a bad habit?
As. : He ia an honest man.
Int. : Isn’t he an honest man?
(ii) 
অনুরূপভাবে না’-বোধক assertive sentence-কে হ্যাঁ’-বোধক interrogative sentence- পরিবর্তিত করে interrogative sentence গঠন করা হয়।  ক্ষেত্রে negative word-গুলোকে affirmative word- পরিবর্তিত করা হয়।
Example : Assertive: He is not a great fool.
Interrogative : Is he a great fool?
Assertive: I was never late.
Interrogative : Was I ever late?

Rule 2 : সাহায্যকারী verb-বিহীন assertive sentence-কে interrogative হলে don’t / doesn’t (present indefinite হলে), did (past indefinit হলে) + subject + base verb + বাকি অংশ + প্রশ্নবোধক চিহ্ন বসবে।
Example : Assertive: They play football.
Interrogative : Don’t they play football?
Assertive: Jerry liked skates.
Interrogative : Did not jerry like skates?

Rule 3 : Never/nothing-যুক্ত assertive sentence-কে interrogative করতে হলে never-এর পরিবর্তে ever এবং nothing থাকলে anything বসবে।
Example. : Assertive: I never drink tea.
Interrogative : Do I ever drink tea?
Assertive: There was nothing to do.
Interrogative : was there anything to do?

Rule 4 : Everybody / everyone / all-কে interrogative করার সময় এদের পরিবর্তে প্রথমে who বসে + don’t / doesn’t / didn’t বসে + মূল verb-এর present form বসে + মূল verb-এর পরের অংশ বসে + প্রশ্নবোধক চিহ্ন বসে। Example : Assertive: Everybody wishes to be happy.
Interrogative : Who doesn’t wish to be happy?
Assertive: All love flowers.
Interrogative : Who doesn’t love flowers?

Rule 5 : Nobody / none / no one-কে interrogative করতে হলে এদের পরিবর্তে who বসে + বাকি অংশ+প্রশ্নবোধক চিহ্ন বসে।
Assertive : Nobody trusts a liar.
Interrogative: Who trusts a liar?
Assertive : None can do this.
Interrogative : Who can do this?

Rule 6 : Assertive sentence- (every, all + noun) subject হিসেবে ব্যবহূত হলে সে ক্ষেত্রে interrogative sentence- every-এর স্থলে is there any ব্যবহূত হয়।
Example : Assertive: All men hate a liar.
Interrogative : Is there any man who doesn’t hate a liar? Assertive : Every man must die.
Interrogative : Is there any who will not die?

Rule 7 : Interoductory ‘there’ দিয়ে সূচিত assertive sentence-কে interrogative sentence- পরিবর্তন করার ক্ষেত্রে there-এর পরিবর্তে sentence-এর প্রথমে who বা what ব্যবহূত হয়। অতঃপর sentence-টি negative হলে Affirmative Interrogative এবং Affirmative হলে Negative-interrogative sentence- পরিবর্তন করা হয়।
Example : Assertive : There is no use of it.
Interrogative: What is the use of it?
Assertive: There is no hope for me.
Interrogative: What is the hope for me?