could chat
Regular verb: chat - chatted- chatted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could chat
you could chat
she could chat
we could chat
you could chat
they could chat 	I could be chatting
you could be chatting
she could be chatting
we could be chatting
you could be chatting
they could be chatting	I could have chatted
you could have chatted
she could have chatted
we could have chatted
you could have chatted
they could have chatted	I could have been chatting
you could have been chatting
she could have been chatting
we could have been chatting
you could have been chatting
they could have been chatting	

Negation 	
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I could not chat
you could not chat
she could not chat
we could not chat
you could not chat
they could not chat 	I could not be chatting
you could not be chatting
she could not be chatting
we could not be chatting
you could not be chatting
they could not be chatting	I could not have chatted
you could not have chatted
she could not have chatted
we could not have chatted
you could not have chatted
they could not have chatted	I could not have been chatting
you could not have been chatting
she could not have been chatting
we could not have been chatting
you could not have been chatting
they could not have been chatting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I chat?
could you chat?
could she chat?
could we chat?
could you chat?
could they chat? 	could I be chatting?
could you be chatting?
could she be chatting?
could we be chatting?
could you be chatting?
could they be chatting? 	could I have chatted?
could you have chatted?
could she have chatted?
could we have chatted?
could you have chatted?
could they have chatted? 	could I have been chatting?
could you have been chatting?
could she have been chatting?
could we have been chatting?
could you have been chatting?
could they have been chatting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not chat?
could you not chat?
could she not chat?
could we not chat?
could you not chat?
could they not chat? 	could I not be chatting?
could you not be chatting?
could she not be chatting?
could we not be chatting?
could you not be chatting?
could they not be chatting? 	could I not have chatted?
could you not have chatted?
could she not have chatted?
could we not have chatted?
could you not have chatted?
could they not have chatted? 	could I not have been chatting?
could you not have been chatting?
could she not have been chatting?
could we not have been chatting?
could you not have been chatting?
could they not have been chatting?