English verb conjugation COULD PERSIST

Regular verb: persist - persisted - persisted

Affirmation

Simple form

I could persist
you could persist
he could persist
we could persist
you could persist
they could persist

V-ing form

I could be persisting
you could be persisting
he could be persisting
we could be persisting
you could be persisting
they could be persisting

Perfect

I could have persisted
you could have persisted
he could have persisted
we could have persisted
you could have persisted
they could have persisted

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I persist?
could you persist?
could he persist?
could we persist?
could you persist?
could they persist?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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