could ventriloquize
Regular verb: ventriloquize - ventriloquized- ventriloquized

Affirmation 	
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I could ventriloquize
you could ventriloquize
she could ventriloquize
we could ventriloquize
you could ventriloquize
they could ventriloquize 	I could be ventriloquizing
you could be ventriloquizing
she could be ventriloquizing
we could be ventriloquizing
you could be ventriloquizing
they could be ventriloquizing	I could have ventriloquized
you could have ventriloquized
she could have ventriloquized
we could have ventriloquized
you could have ventriloquized
they could have ventriloquized	I could have been ventriloquizing
you could have been ventriloquizing
she could have been ventriloquizing
we could have been ventriloquizing
you could have been ventriloquizing
they could have been ventriloquizing	

Negation 	
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I couldn't ventriloquize
you couldn't ventriloquize
she couldn't ventriloquize
we couldn't ventriloquize
you couldn't ventriloquize
they couldn't ventriloquize 	I couldn't be ventriloquizing
you couldn't be ventriloquizing
she couldn't be ventriloquizing
we couldn't be ventriloquizing
you couldn't be ventriloquizing
they couldn't be ventriloquizing	I couldn't have ventriloquized
you couldn't have ventriloquized
she couldn't have ventriloquized
we couldn't have ventriloquized
you couldn't have ventriloquized
they couldn't have ventriloquized	I couldn't have been ventriloquizing
you couldn't have been ventriloquizing
she couldn't have been ventriloquizing
we couldn't have been ventriloquizing
you couldn't have been ventriloquizing
they couldn't have been ventriloquizing	

Interrogative form 	
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could I ventriloquize?
could you ventriloquize?
could she ventriloquize?
could we ventriloquize?
could you ventriloquize?
could they ventriloquize? 	could I be ventriloquizing?
could you be ventriloquizing?
could she be ventriloquizing?
could we be ventriloquizing?
could you be ventriloquizing?
could they be ventriloquizing? 	could I have ventriloquized?
could you have ventriloquized?
could she have ventriloquized?
could we have ventriloquized?
could you have ventriloquized?
could they have ventriloquized? 	could I have been ventriloquizing?
could you have been ventriloquizing?
could she have been ventriloquizing?
could we have been ventriloquizing?
could you have been ventriloquizing?
could they have been ventriloquizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I ventriloquize?
couldn't you ventriloquize?
couldn't she ventriloquize?
couldn't we ventriloquize?
couldn't you ventriloquize?
couldn't they ventriloquize? 	couldn't I be ventriloquizing?
couldn't you be ventriloquizing?
couldn't she be ventriloquizing?
couldn't we be ventriloquizing?
couldn't you be ventriloquizing?
couldn't they be ventriloquizing? 	couldn't I have ventriloquized?
couldn't you have ventriloquized?
couldn't she have ventriloquized?
couldn't we have ventriloquized?
couldn't you have ventriloquized?
couldn't they have ventriloquized? 	couldn't I have been ventriloquizing?
couldn't you have been ventriloquizing?
couldn't she have been ventriloquizing?
couldn't we have been ventriloquizing?
couldn't you have been ventriloquizing?
couldn't they have been ventriloquizing?