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 can't underuse
you can't underuse
he can't underuse
we can't underuse
you can't underuse
they can't underuse

V-ing form

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

Perfect

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

V-ing perfect

I can't have been underusing
you can't have been underusing
he can't have been underusing
we can't have been underusing
you can't have been underusing
they can't 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't I underuse?
can't you underuse?
can't he underuse?
can't we underuse?
can't you underuse?
can't they underuse?

V-ing form

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

Perfect

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

V-ing perfect

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

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