Conjugaison du verbe anglais COULD INSERT

I could insert
you could insert
he could insert
we could insert
you could insert
they could insert

I could be inserting
you could be inserting
he could be inserting
we could be inserting
you could be inserting
they could be inserting

I could have inserted
you could have inserted
he could have inserted
we could have inserted
you could have inserted
they could have inserted

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

I could not insert
you could not insert
he could not insert
we could not insert
you could not insert
they could not insert

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

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

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

could I insert?
could you insert?
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could I not insert?
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could they not be inserting?

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could they not have inserted?

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could you not have been inserting?
could he not have been inserting?
could we not have been inserting?
could you not have been inserting?
could they not have been inserting?