English verb conjugation COULD PERSEVERE

Regular verb: persevere - persevered - persevered

Affirmation

Simple form

I could persevere
you could persevere
he could persevere
we could persevere
you could persevere
they could persevere

V-ing form

I could be persevering
you could be persevering
he could be persevering
we could be persevering
you could be persevering
they could be persevering

Perfect

I could have persevered
you could have persevered
he could have persevered
we could have persevered
you could have persevered
they could have persevered

V-ing perfect

I could have been persevering
you could have been persevering
he could have been persevering
we could have been persevering
you could have been persevering
they could have been persevering

Negation

Simple form

I couldn't persevere
you couldn't persevere
he couldn't persevere
we couldn't persevere
you couldn't persevere
they couldn't persevere

V-ing form

I couldn't be persevering
you couldn't be persevering
he couldn't be persevering
we couldn't be persevering
you couldn't be persevering
they couldn't be persevering

Perfect

I couldn't have persevered
you couldn't have persevered
he couldn't have persevered
we couldn't have persevered
you couldn't have persevered
they couldn't have persevered

V-ing perfect

I couldn't have been persevering
you couldn't have been persevering
he couldn't have been persevering
we couldn't have been persevering
you couldn't have been persevering
they couldn't have been persevering

Interrogative form

Simple form

could I persevere?
could you persevere?
could he persevere?
could we persevere?
could you persevere?
could they persevere?

V-ing form

could I be persevering?
could you be persevering?
could he be persevering?
could we be persevering?
could you be persevering?
could they be persevering?

Perfect

could I have persevered?
could you have persevered?
could he have persevered?
could we have persevered?
could you have persevered?
could they have persevered?

V-ing perfect

could I have been persevering?
could you have been persevering?
could he have been persevering?
could we have been persevering?
could you have been persevering?
could they have been persevering?

Interro-negative form

Simple form

couldn't I persevere?
couldn't you persevere?
couldn't he persevere?
couldn't we persevere?
couldn't you persevere?
couldn't they persevere?

V-ing form

couldn't I be persevering?
couldn't you be persevering?
couldn't he be persevering?
couldn't we be persevering?
couldn't you be persevering?
couldn't they be persevering?

Perfect

couldn't I have persevered?
couldn't you have persevered?
couldn't he have persevered?
couldn't we have persevered?
couldn't you have persevered?
couldn't they have persevered?

V-ing perfect

couldn't I have been persevering?
couldn't you have been persevering?
couldn't he have been persevering?
couldn't we have been persevering?
couldn't you have been persevering?
couldn't they have been persevering?

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