can,coud; will, would; shall, should; may, might; must and ought are auxiliary verbs. CB, I don't think they have infinitives, such as to shall, to may etc.
CB said: ''There are two infintives in both the active and the passive voices in English.''
What are these two infinitives?
Your teacher may have discussed the sequence of tenses.
Your teacher might have discussed the sequence of tenses.
What is difference between the meanings of above two sentences?