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 cannot tighten
you cannot tighten
he cannot tighten
we cannot tighten
you cannot tighten
they cannot tighten

V-ing form

I cannot be tightening
you cannot be tightening
he cannot be tightening
we cannot be tightening
you cannot be tightening
they cannot be tightening

Perfect

I cannot have tightened
you cannot have tightened
he cannot have tightened
we cannot have tightened
you cannot have tightened
they cannot have tightened

V-ing perfect

I cannot have been tightening
you cannot have been tightening
he cannot have been tightening
we cannot have been tightening
you cannot have been tightening
they cannot 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 I not tighten?
can you not tighten?
can he not tighten?
can we not tighten?
can you not tighten?
can they not tighten?

V-ing form

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

Perfect

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

V-ing perfect

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