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 can't weaken
you can't weaken
he can't weaken
we can't weaken
you can't weaken
they can't weaken

V-ing form

I can't be weakening
you can't be weakening
he can't be weakening
we can't be weakening
you can't be weakening
they can't be weakening

Perfect

I can't have weakened
you can't have weakened
he can't have weakened
we can't have weakened
you can't have weakened
they can't have weakened

V-ing perfect

I can't have been weakening
you can't have been weakening
he can't have been weakening
we can't have been weakening
you can't have been weakening
they can't 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't I weaken?
can't you weaken?
can't he weaken?
can't we weaken?
can't you weaken?
can't they weaken?

V-ing form

can't I be weakening?
can't you be weakening?
can't he be weakening?
can't we be weakening?
can't you be weakening?
can't they be weakening?

Perfect

can't I have weakened?
can't you have weakened?
can't he have weakened?
can't we have weakened?
can't you have weakened?
can't they have weakened?

V-ing perfect

can't I have been weakening?
can't you have been weakening?
can't he have been weakening?
can't we have been weakening?
can't you have been weakening?
can't they have been weakening?

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