could reply
Regular verb: reply - replied- replied

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could reply
you could reply
she could reply
we could reply
you could reply
they could reply 	I could be replying
you could be replying
she could be replying
we could be replying
you could be replying
they could be replying	I could have replied
you could have replied
she could have replied
we could have replied
you could have replied
they could have replied	I could have been replying
you could have been replying
she could have been replying
we could have been replying
you could have been replying
they could have been replying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't reply
you couldn't reply
she couldn't reply
we couldn't reply
you couldn't reply
they couldn't reply 	I couldn't be replying
you couldn't be replying
she couldn't be replying
we couldn't be replying
you couldn't be replying
they couldn't be replying	I couldn't have replied
you couldn't have replied
she couldn't have replied
we couldn't have replied
you couldn't have replied
they couldn't have replied	I couldn't have been replying
you couldn't have been replying
she couldn't have been replying
we couldn't have been replying
you couldn't have been replying
they couldn't have been replying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I reply?
could you reply?
could she reply?
could we reply?
could you reply?
could they reply? 	could I be replying?
could you be replying?
could she be replying?
could we be replying?
could you be replying?
could they be replying? 	could I have replied?
could you have replied?
could she have replied?
could we have replied?
could you have replied?
could they have replied? 	could I have been replying?
could you have been replying?
could she have been replying?
could we have been replying?
could you have been replying?
could they have been replying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I reply?
couldn't you reply?
couldn't she reply?
couldn't we reply?
couldn't you reply?
couldn't they reply? 	couldn't I be replying?
couldn't you be replying?
couldn't she be replying?
couldn't we be replying?
couldn't you be replying?
couldn't they be replying? 	couldn't I have replied?
couldn't you have replied?
couldn't she have replied?
couldn't we have replied?
couldn't you have replied?
couldn't they have replied? 	couldn't I have been replying?
couldn't you have been replying?
couldn't she have been replying?
couldn't we have been replying?
couldn't you have been replying?
couldn't they have been replying?