could force
Regular verb: force - forced- forced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could force
you could force
she could force
we could force
you could force
they could force 	I could be forcing
you could be forcing
she could be forcing
we could be forcing
you could be forcing
they could be forcing	I could have forced
you could have forced
she could have forced
we could have forced
you could have forced
they could have forced	I could have been forcing
you could have been forcing
she could have been forcing
we could have been forcing
you could have been forcing
they could have been forcing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't force
you couldn't force
she couldn't force
we couldn't force
you couldn't force
they couldn't force 	I couldn't be forcing
you couldn't be forcing
she couldn't be forcing
we couldn't be forcing
you couldn't be forcing
they couldn't be forcing	I couldn't have forced
you couldn't have forced
she couldn't have forced
we couldn't have forced
you couldn't have forced
they couldn't have forced	I couldn't have been forcing
you couldn't have been forcing
she couldn't have been forcing
we couldn't have been forcing
you couldn't have been forcing
they couldn't have been forcing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I force?
could you force?
could she force?
could we force?
could you force?
could they force? 	could I be forcing?
could you be forcing?
could she be forcing?
could we be forcing?
could you be forcing?
could they be forcing? 	could I have forced?
could you have forced?
could she have forced?
could we have forced?
could you have forced?
could they have forced? 	could I have been forcing?
could you have been forcing?
could she have been forcing?
could we have been forcing?
could you have been forcing?
could they have been forcing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I force?
couldn't you force?
couldn't she force?
couldn't we force?
couldn't you force?
couldn't they force? 	couldn't I be forcing?
couldn't you be forcing?
couldn't she be forcing?
couldn't we be forcing?
couldn't you be forcing?
couldn't they be forcing? 	couldn't I have forced?
couldn't you have forced?
couldn't she have forced?
couldn't we have forced?
couldn't you have forced?
couldn't they have forced? 	couldn't I have been forcing?
couldn't you have been forcing?
couldn't she have been forcing?
couldn't we have been forcing?
couldn't you have been forcing?
couldn't they have been forcing?