English verb conjugation CAN TIGHTEN

Regular verb: tighten - tightened - tightened

Affirmation

Simple form

I can tighten
you can tighten
he can tighten
we can tighten
you can tighten
they can tighten

V-ing form

I can be tightening
you can be tightening
he can be tightening
we can be tightening
you can be tightening
they can be tightening

Perfect

I can have tightened
you can have tightened
he can have tightened
we can have tightened
you can have tightened
they can have tightened

V-ing perfect

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

Negation

Simple form

I can't tighten
you can't tighten
he can't tighten
we can't tighten
you can't tighten
they can't tighten

V-ing form

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

Perfect

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

V-ing perfect

I can't have been tightening
you can't have been tightening
he can't have been tightening
we can't have been tightening
you can't have been tightening
they can't have been tightening

Interrogative form

Simple form

can I tighten?
can you tighten?
can he tighten?
can we tighten?
can you tighten?
can they tighten?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

can't I tighten?
can't you tighten?
can't he tighten?
can't we tighten?
can't you tighten?
can't they tighten?

V-ing form

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

Perfect

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

V-ing perfect

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

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