English verb conjugation CAN WEAKEN

Regular verb: weaken - weakened - weakened

Affirmation

Simple form

I can weaken
you can weaken
he can weaken
we can weaken
you can weaken
they can weaken

V-ing form

I can be weakening
you can be weakening
he can be weakening
we can be weakening
you can be weakening
they can be weakening

Perfect

I can have weakened
you can have weakened
he can have weakened
we can have weakened
you can have weakened
they can have weakened

V-ing perfect

I can have been weakening
you can have been weakening
he can have been weakening
we can have been weakening
you can have been weakening
they can have been weakening

Negation

Simple form

I cannot weaken
you cannot weaken
he cannot weaken
we cannot weaken
you cannot weaken
they cannot weaken

V-ing form

I cannot be weakening
you cannot be weakening
he cannot be weakening
we cannot be weakening
you cannot be weakening
they cannot be weakening

Perfect

I cannot have weakened
you cannot have weakened
he cannot have weakened
we cannot have weakened
you cannot have weakened
they cannot have weakened

V-ing perfect

I cannot have been weakening
you cannot have been weakening
he cannot have been weakening
we cannot have been weakening
you cannot have been weakening
they cannot have been weakening

Interrogative form

Simple form

can I weaken?
can you weaken?
can he weaken?
can we weaken?
can you weaken?
can they weaken?

V-ing form

can I be weakening?
can you be weakening?
can he be weakening?
can we be weakening?
can you be weakening?
can they be weakening?

Perfect

can I have weakened?
can you have weakened?
can he have weakened?
can we have weakened?
can you have weakened?
can they have weakened?

V-ing perfect

can I have been weakening?
can you have been weakening?
can he have been weakening?
can we have been weakening?
can you have been weakening?
can they have been weakening?

Interro-negative form

Simple form

can I not weaken?
can you not weaken?
can he not weaken?
can we not weaken?
can you not weaken?
can they not weaken?

V-ing form

can I not be weakening?
can you not be weakening?
can he not be weakening?
can we not be weakening?
can you not be weakening?
can they not be weakening?

Perfect

can I not have weakened?
can you not have weakened?
can he not have weakened?
can we not have weakened?
can you not have weakened?
can they not have weakened?

V-ing perfect

can I not have been weakening?
can you not have been weakening?
can he not have been weakening?
can we not have been weakening?
can you not have been weakening?
can they not have been weakening?

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