could fly
Irregular verb: fly - flew- flown

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could fly
you could fly
she could fly
we could fly
you could fly
they could fly 	I could be flying
you could be flying
she could be flying
we could be flying
you could be flying
they could be flying	I could have flown
you could have flown
she could have flown
we could have flown
you could have flown
they could have flown	I could have been flying
you could have been flying
she could have been flying
we could have been flying
you could have been flying
they could have been flying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not fly
you could not fly
she could not fly
we could not fly
you could not fly
they could not fly 	I could not be flying
you could not be flying
she could not be flying
we could not be flying
you could not be flying
they could not be flying	I could not have flown
you could not have flown
she could not have flown
we could not have flown
you could not have flown
they could not have flown	I could not have been flying
you could not have been flying
she could not have been flying
we could not have been flying
you could not have been flying
they could not have been flying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I fly?
could you fly?
could she fly?
could we fly?
could you fly?
could they fly? 	could I be flying?
could you be flying?
could she be flying?
could we be flying?
could you be flying?
could they be flying? 	could I have flown?
could you have flown?
could she have flown?
could we have flown?
could you have flown?
could they have flown? 	could I have been flying?
could you have been flying?
could she have been flying?
could we have been flying?
could you have been flying?
could they have been flying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not fly?
could you not fly?
could she not fly?
could we not fly?
could you not fly?
could they not fly? 	could I not be flying?
could you not be flying?
could she not be flying?
could we not be flying?
could you not be flying?
could they not be flying? 	could I not have flown?
could you not have flown?
could she not have flown?
could we not have flown?
could you not have flown?
could they not have flown? 	could I not have been flying?
could you not have been flying?
could she not have been flying?
could we not have been flying?
could you not have been flying?
could they not have been flying?