Modals in the past form

Modals is word that belongs personal pronoun(subject) with infinitive such as can,may,and must.

At this lesson we learn modals in the past form such as could,might,and had to.

Can Could

May Might

Must Had to

Example :

o Could

Affirmative : I could played piano.

Negative : I couldn’t play piano

Interrogative : Could I play piano?

o May

Affirmative : I might went at night for browsing.

Negative : I mightn’t go at night for browsing.

Interrogative : Might I go at night for browsing?

o Had to

Affirmative : I had to studied Chemistry for test tomorrow.

Negative : I hadn’t to studied chemistry for test tomorrow.

Interrogative : Had I to study chemistry for test today?