could contract
Regular verb: contract - contracted- contracted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could contract
you could contract
she could contract
we could contract
you could contract
they could contract 	I could be contracting
you could be contracting
she could be contracting
we could be contracting
you could be contracting
they could be contracting	I could have contracted
you could have contracted
she 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
she 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 couldn't contract
you couldn't contract
she couldn't contract
we couldn't contract
you couldn't contract
they couldn't contract 	I couldn't be contracting
you couldn't be contracting
she couldn't be contracting
we couldn't be contracting
you couldn't be contracting
they couldn't be contracting	I couldn't have contracted
you couldn't have contracted
she couldn't have contracted
we couldn't have contracted
you couldn't have contracted
they couldn't have contracted	I couldn't have been contracting
you couldn't have been contracting
she couldn't have been contracting
we couldn't have been contracting
you couldn't have been contracting
they couldn't have been contracting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I contract?
could you contract?
could she contract?
could we contract?
could you contract?
could they contract? 	could I be contracting?
could you be contracting?
could she be contracting?
could we be contracting?
could you be contracting?
could they be contracting? 	could I have contracted?
could you have contracted?
could she 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 she 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 	
couldn't I contract?
couldn't you contract?
couldn't she contract?
couldn't we contract?
couldn't you contract?
couldn't they contract? 	couldn't I be contracting?
couldn't you be contracting?
couldn't she be contracting?
couldn't we be contracting?
couldn't you be contracting?
couldn't they be contracting? 	couldn't I have contracted?
couldn't you have contracted?
couldn't she have contracted?
couldn't we have contracted?
couldn't you have contracted?
couldn't they have contracted? 	couldn't I have been contracting?
couldn't you have been contracting?
couldn't she have been contracting?
couldn't we have been contracting?
couldn't you have been contracting?
couldn't they have been contracting?