English verb conjugation COULD DEVISE

Regular verb: devise - devised - devised

Affirmation

Simple form

I could devise
you could devise
he could devise
we could devise
you could devise
they could devise

V-ing form

I could be devising
you could be devising
he could be devising
we could be devising
you could be devising
they could be devising

Perfect

I could have devised
you could have devised
he could have devised
we could have devised
you could have devised
they could have devised

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I devise?
could you devise?
could he devise?
could we devise?
could you devise?
could they devise?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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