Interrogative sentence pattern

To build up interrogative sentence, it has three rules---

• If any sentence has Be verb(am,is.are)/ Have verb(has,have,had)/Modal verb(shall,should,will,would,can,could,may,might) then these verb sits before the subject on interrogative sentence. Example-

  Assertive sentence                                     Interrogative sentence
Bimol is your brother                                    Is Bimal your brother?
He has got a bad tooth                                  Has he got a bad tooth?

• If any sentence has not these(above↑) verb, then use Do verb before the subject. This Do verb change by tense and person, but the main verb do not change. Example--

  Assertive sentence                                     Interrogative sentence
He goes to school                                           Does he go to school?
He does his homework                            Does he do his homework?

• If  any sentence has WH (who, whose, whom, what, why, which, where), how much, how many etc question word, then these word sit before the sentence. Example-

1. Who are you?
2. Whose book is this?
3. Which is your pen?
4. When do you eat?
5. What are you doing?

*If  Who is his own subject, the Do is not necessary to use. Example-

• Who insulted you?

*But in negative sentence Do is necessary to use. Example-

• Who does not know it?