English verb conjugation CAN UNDERUSE

Regular verb: underuse - underused - underused

Affirmation

Simple form

I can underuse
you can underuse
he can underuse
we can underuse
you can underuse
they can underuse

V-ing form

I can be underusing
you can be underusing
he can be underusing
we can be underusing
you can be underusing
they can be underusing

Perfect

I can have underused
you can have underused
he can have underused
we can have underused
you can have underused
they can have underused

V-ing perfect

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

Negation

Simple form

I cannot underuse
you cannot underuse
he cannot underuse
we cannot underuse
you cannot underuse
they cannot underuse

V-ing form

I cannot be underusing
you cannot be underusing
he cannot be underusing
we cannot be underusing
you cannot be underusing
they cannot be underusing

Perfect

I cannot have underused
you cannot have underused
he cannot have underused
we cannot have underused
you cannot have underused
they cannot have underused

V-ing perfect

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

Interrogative form

Simple form

can I underuse?
can you underuse?
can he underuse?
can we underuse?
can you underuse?
can they underuse?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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