English verb conjugation COULD INVENT

Regular verb: invent - invented - invented

Affirmation

Simple form

I could invent
you could invent
he could invent
we could invent
you could invent
they could invent

V-ing form

I could be inventing
you could be inventing
he could be inventing
we could be inventing
you could be inventing
they could be inventing

Perfect

I could have invented
you could have invented
he could have invented
we could have invented
you could have invented
they could have invented

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I invent?
could you invent?
could he invent?
could we invent?
could you invent?
could they invent?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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