Modal verbs in English include will, would, shall, should, can, could, may, might, must, and ought to. All modal verbs form negative sentences with "not" and interrogative sentences with subject-verb inversion. Modal verbs are not used in continuous tenses and cannot be used with "to"; only one modal verb can be used at a time in a sentence.

1. Modal verbs

2. The modal verbs in English are : will, would, shall, should, can, could, may, might, must, ought to

3. All modal verbs form negative sentences with “not” I cannot play the guitar We must not do it She may not come tonight

4. All modal verbs form interrogative sentences with inversion Should we buy him flowers? May I help you, sir? Will you stay for dinner?

5. Modal verbs are not used in continuous tenses canning, mighting, maying, musting, woulding, oughting, shoulding, shalling are not correct expressions because modal verbs don’t get ‘-ing’ form

6. You cannot use ‘to’ after modal verbs They can to sleep here ( not correct) They can sleep here ( correct ) You may to enter the shop ( not correct) You may enter the shop ( correct)

7. Two modal verbs don’t go one after other I might can come ( not correct)