could conjugate
Regular verb: conjugate - conjugated- conjugated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could conjugate
you could conjugate
she could conjugate
we could conjugate
you could conjugate
they could conjugate 	I could be conjugating
you could be conjugating
she could be conjugating
we could be conjugating
you could be conjugating
they could be conjugating	I could have conjugated
you could have conjugated
she could have conjugated
we could have conjugated
you could have conjugated
they could have conjugated	I could have been conjugating
you could have been conjugating
she could have been conjugating
we could have been conjugating
you could have been conjugating
they could have been conjugating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't conjugate
you couldn't conjugate
she couldn't conjugate
we couldn't conjugate
you couldn't conjugate
they couldn't conjugate 	I couldn't be conjugating
you couldn't be conjugating
she couldn't be conjugating
we couldn't be conjugating
you couldn't be conjugating
they couldn't be conjugating	I couldn't have conjugated
you couldn't have conjugated
she couldn't have conjugated
we couldn't have conjugated
you couldn't have conjugated
they couldn't have conjugated	I couldn't have been conjugating
you couldn't have been conjugating
she couldn't have been conjugating
we couldn't have been conjugating
you couldn't have been conjugating
they couldn't have been conjugating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I conjugate?
could you conjugate?
could she conjugate?
could we conjugate?
could you conjugate?
could they conjugate? 	could I be conjugating?
could you be conjugating?
could she be conjugating?
could we be conjugating?
could you be conjugating?
could they be conjugating? 	could I have conjugated?
could you have conjugated?
could she have conjugated?
could we have conjugated?
could you have conjugated?
could they have conjugated? 	could I have been conjugating?
could you have been conjugating?
could she have been conjugating?
could we have been conjugating?
could you have been conjugating?
could they have been conjugating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I conjugate?
couldn't you conjugate?
couldn't she conjugate?
couldn't we conjugate?
couldn't you conjugate?
couldn't they conjugate? 	couldn't I be conjugating?
couldn't you be conjugating?
couldn't she be conjugating?
couldn't we be conjugating?
couldn't you be conjugating?
couldn't they be conjugating? 	couldn't I have conjugated?
couldn't you have conjugated?
couldn't she have conjugated?
couldn't we have conjugated?
couldn't you have conjugated?
couldn't they have conjugated? 	couldn't I have been conjugating?
couldn't you have been conjugating?
couldn't she have been conjugating?
couldn't we have been conjugating?
couldn't you have been conjugating?
couldn't they have been conjugating?