could mildew
Regular verb: mildew - mildewed- mildewed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could mildew
you could mildew
she could mildew
we could mildew
you could mildew
they could mildew 	I could be mildewing
you could be mildewing
she could be mildewing
we could be mildewing
you could be mildewing
they could be mildewing	I could have mildewed
you could have mildewed
she could have mildewed
we could have mildewed
you could have mildewed
they could have mildewed	I could have been mildewing
you could have been mildewing
she could have been mildewing
we could have been mildewing
you could have been mildewing
they could have been mildewing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not mildew
you could not mildew
she could not mildew
we could not mildew
you could not mildew
they could not mildew 	I could not be mildewing
you could not be mildewing
she could not be mildewing
we could not be mildewing
you could not be mildewing
they could not be mildewing	I could not have mildewed
you could not have mildewed
she could not have mildewed
we could not have mildewed
you could not have mildewed
they could not have mildewed	I could not have been mildewing
you could not have been mildewing
she could not have been mildewing
we could not have been mildewing
you could not have been mildewing
they could not have been mildewing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I mildew?
could you mildew?
could she mildew?
could we mildew?
could you mildew?
could they mildew? 	could I be mildewing?
could you be mildewing?
could she be mildewing?
could we be mildewing?
could you be mildewing?
could they be mildewing? 	could I have mildewed?
could you have mildewed?
could she have mildewed?
could we have mildewed?
could you have mildewed?
could they have mildewed? 	could I have been mildewing?
could you have been mildewing?
could she have been mildewing?
could we have been mildewing?
could you have been mildewing?
could they have been mildewing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not mildew?
could you not mildew?
could she not mildew?
could we not mildew?
could you not mildew?
could they not mildew? 	could I not be mildewing?
could you not be mildewing?
could she not be mildewing?
could we not be mildewing?
could you not be mildewing?
could they not be mildewing? 	could I not have mildewed?
could you not have mildewed?
could she not have mildewed?
could we not have mildewed?
could you not have mildewed?
could they not have mildewed? 	could I not have been mildewing?
could you not have been mildewing?
could she not have been mildewing?
could we not have been mildewing?
could you not have been mildewing?
could they not have been mildewing?