can chat
Regular verb: chat - chatted- chatted

Affirmation 	
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I can chat
you can chat
she can chat
we can chat
you can chat
they can chat 	I can be chatting
you can be chatting
she can be chatting
we can be chatting
you can be chatting
they can be chatting	I can have chatted
you can have chatted
she can have chatted
we can have chatted
you can have chatted
they can have chatted	I can have been chatting
you can have been chatting
she can have been chatting
we can have been chatting
you can have been chatting
they can have been chatting	

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

Interrogative form 	
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can I chat?
can you chat?
can she chat?
can we chat?
can you chat?
can they chat? 	can I be chatting?
can you be chatting?
can she be chatting?
can we be chatting?
can you be chatting?
can they be chatting? 	can I have chatted?
can you have chatted?
can she have chatted?
can we have chatted?
can you have chatted?
can they have chatted? 	can I have been chatting?
can you have been chatting?
can she have been chatting?
can we have been chatting?
can you have been chatting?
can they have been chatting? 	

Interro-negative form 	
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can I not chat?
can you not chat?
can she not chat?
can we not chat?
can you not chat?
can they not chat? 	can I not be chatting?
can you not be chatting?
can she not be chatting?
can we not be chatting?
can you not be chatting?
can they not be chatting? 	can I not have chatted?
can you not have chatted?
can she not have chatted?
can we not have chatted?
can you not have chatted?
can they not have chatted? 	can I not have been chatting?
can you not have been chatting?
can she not have been chatting?
can we not have been chatting?
can you not have been chatting?
can they not have been chatting?