English verb conjugation COULD PROP

Regular verb: prop - propped - propped

Affirmation

Simple form

I could prop
you could prop
he could prop
we could prop
you could prop
they could prop

V-ing form

I could be propping
you could be propping
he could be propping
we could be propping
you could be propping
they could be propping

Perfect

I could have propped
you could have propped
he could have propped
we could have propped
you could have propped
they could have propped

V-ing perfect

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

Negation

Simple form

I could not prop
you could not prop
he could not prop
we could not prop
you could not prop
they could not prop

V-ing form

I could not be propping
you could not be propping
he could not be propping
we could not be propping
you could not be propping
they could not be propping

Perfect

I could not have propped
you could not have propped
he could not have propped
we could not have propped
you could not have propped
they could not have propped

V-ing perfect

I could not have been propping
you could not have been propping
he could not have been propping
we could not have been propping
you could not have been propping
they could not have been propping

Interrogative form

Simple form

could I prop?
could you prop?
could he prop?
could we prop?
could you prop?
could they prop?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

could I not prop?
could you not prop?
could he not prop?
could we not prop?
could you not prop?
could they not prop?

V-ing form

could I not be propping?
could you not be propping?
could he not be propping?
could we not be propping?
could you not be propping?
could they not be propping?

Perfect

could I not have propped?
could you not have propped?
could he not have propped?
could we not have propped?
could you not have propped?
could they not have propped?

V-ing perfect

could I not have been propping?
could you not have been propping?
could he not have been propping?
could we not have been propping?
could you not have been propping?
could they not have been propping?

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