English verb conjugation CAN

Modal auxiliary can - could

Affirmation

Simple form

-

V-ing form

-

Perfect

-

V-ing perfect

-

Negation

Simple form

-

V-ing form

-

Perfect

-

V-ing perfect

-

Interrogative form

Simple form

-

V-ing form

-

Perfect

-

V-ing perfect

-

Interro-negative form

Simple form

-

V-ing form

-

Perfect

-

V-ing perfect

-