English verb conjugation COULD DERIVE

Regular verb: derive - derived - derived

Affirmation

Simple form

I could derive
you could derive
she could derive
we could derive
you could derive
they could derive

V-ing form

I could be deriving
you could be deriving
she could be deriving
we could be deriving
you could be deriving
they could be deriving

Perfect

I could have derived
you could have derived
she could have derived
we could have derived
you could have derived
they could have derived

V-ing perfect

I could have been deriving
you could have been deriving
she could have been deriving
we could have been deriving
you could have been deriving
they could have been deriving

Negation

Simple form

I couldn't derive
you couldn't derive
she couldn't derive
we couldn't derive
you couldn't derive
they couldn't derive

V-ing form

I couldn't be deriving
you couldn't be deriving
she couldn't be deriving
we couldn't be deriving
you couldn't be deriving
they couldn't be deriving

Perfect

I couldn't have derived
you couldn't have derived
she couldn't have derived
we couldn't have derived
you couldn't have derived
they couldn't have derived

V-ing perfect

I couldn't have been deriving
you couldn't have been deriving
she couldn't have been deriving
we couldn't have been deriving
you couldn't have been deriving
they couldn't have been deriving

Interrogative form

Simple form

could I derive?
could you derive?
could she derive?
could we derive?
could you derive?
could they derive?

V-ing form

could I be deriving?
could you be deriving?
could she be deriving?
could we be deriving?
could you be deriving?
could they be deriving?

Perfect

could I have derived?
could you have derived?
could she have derived?
could we have derived?
could you have derived?
could they have derived?

V-ing perfect

could I have been deriving?
could you have been deriving?
could she have been deriving?
could we have been deriving?
could you have been deriving?
could they have been deriving?

Interro-negative form

Simple form

couldn't I derive?
couldn't you derive?
couldn't she derive?
couldn't we derive?
couldn't you derive?
couldn't they derive?

V-ing form

couldn't I be deriving?
couldn't you be deriving?
couldn't she be deriving?
couldn't we be deriving?
couldn't you be deriving?
couldn't they be deriving?

Perfect

couldn't I have derived?
couldn't you have derived?
couldn't she have derived?
couldn't we have derived?
couldn't you have derived?
couldn't they have derived?

V-ing perfect

couldn't I have been deriving?
couldn't you have been deriving?
couldn't she have been deriving?
couldn't we have been deriving?
couldn't you have been deriving?
couldn't they have been deriving?

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