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 couldn't contract
you couldn't contract
he 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
he 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
he 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
he 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 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 	
couldn't I contract?
couldn't you contract?
couldn't he 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 he 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 he 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 he have been contracting?
couldn't we have been contracting?
couldn't you have been contracting?
couldn't they have been contracting?