English verb conjugation CAN SUSTAIN

Regular verb: sustain - sustained - sustained

Affirmation

Simple form

I can sustain
you can sustain
he can sustain
we can sustain
you can sustain
they can sustain

V-ing form

I can be sustaining
you can be sustaining
he can be sustaining
we can be sustaining
you can be sustaining
they can be sustaining

Perfect

I can have sustained
you can have sustained
he can have sustained
we can have sustained
you can have sustained
they can have sustained

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

can I sustain?
can you sustain?
can he sustain?
can we sustain?
can you sustain?
can they sustain?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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