could contract
Regular verb: contract - contracted- contracted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could contract
you could contract
he could contract
we could contract
you could contract
they could contract 	I could be contracting
you could be contracting
he could be contracting
we could be contracting
you could be contracting
they could be contracting	I could have contracted
you could have contracted
he could have contracted
we could have contracted
you could have contracted
they could have contracted	I could have been contracting
you could have been contracting
he could have been contracting
we could have been contracting
you could have been contracting
they could have been contracting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not contract
you could not contract
he could not contract
we could not contract
you could not contract
they could not contract 	I could not be contracting
you could not be contracting
he could not be contracting
we could not be contracting
you could not be contracting
they could not be contracting	I could not have contracted
you could not have contracted
he could not have contracted
we could not have contracted
you could not have contracted
they could not have contracted	I could not have been contracting
you could not have been contracting
he could not have been contracting
we could not have been contracting
you could not have been contracting
they could not have been contracting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I contract?
could you contract?
could he contract?
could we contract?
could you contract?
could they contract? 	could I be contracting?
could you be contracting?
could he be contracting?
could we be contracting?
could you be contracting?
could they be contracting? 	could I have contracted?
could you have contracted?
could he have contracted?
could we have contracted?
could you have contracted?
could they have contracted? 	could I have been contracting?
could you have been contracting?
could he have been contracting?
could we have been contracting?
could you have been contracting?
could they have been contracting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not contract?
could you not contract?
could he not contract?
could we not contract?
could you not contract?
could they not contract? 	could I not be contracting?
could you not be contracting?
could he not be contracting?
could we not be contracting?
could you not be contracting?
could they not be contracting? 	could I not have contracted?
could you not have contracted?
could he not have contracted?
could we not have contracted?
could you not have contracted?
could they not have contracted? 	could I not have been contracting?
could you not have been contracting?
could he not have been contracting?
could we not have been contracting?
could you not have been contracting?
could they not have been contracting?