English verb conjugation COULD PRESERVE

Regular verb: preserve - preserved - preserved

Affirmation

Simple form

I could preserve
you could preserve
he could preserve
we could preserve
you could preserve
they could preserve

V-ing form

I could be preserving
you could be preserving
he could be preserving
we could be preserving
you could be preserving
they could be preserving

Perfect

I could have preserved
you could have preserved
he could have preserved
we could have preserved
you could have preserved
they could have preserved

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I preserve?
could you preserve?
could he preserve?
could we preserve?
could you preserve?
could they preserve?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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