Present, Future, Past Formula and Function

Present and Future Forms

Can, Could, "Be" able to

can be used in past as a long action or negative short action

Can, Could, Would

Would like/Would prefer/Would rather

Could May/Might Will

MAYBE IS THE ADVERB

Have to & Have got to & Must

May/Might + be able to/have to

Should & Ought to

Had better (you'd better) & Must

DRAWING A CONCLUSION

PAST MODALS

Similar in Meaning

Modal + Base form of Have + Past Participle

Create a Past Modal Sentence

Would . . . .(dependent clauses with if)

REAL AND UNREAL

If I have time, I play the drums

If I have money, I am going to go to the concert.

If I had money, I would buy another guitar.

If I had seen the artist, I would have known about his backup dancers.