English verb conjugation
MUST CHAT

Regular verb: chat - chatted - chatted

Affirmation

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

Negation

Simple form	V-ing form
I mustn't chat you mustn't chat she mustn't chat we mustn't chat you mustn't chat they mustn't chat	I mustn't be chatting you mustn't be chatting she mustn't be chatting we mustn't be chatting you mustn't be chatting they mustn't be chatting
Perfect	V-ing perfect
I mustn't have chatted you mustn't have chatted she mustn't have chatted we mustn't have chatted you mustn't have chatted they mustn't have chatted	I mustn't have been chatting you mustn't have been chatting she mustn't have been chatting we mustn't have been chatting you mustn't have been chatting they mustn't have been chatting

Interrogative form

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

Interro-negative form

Simple form	V-ing form
mustn't I chat? mustn't you chat? mustn't she chat? mustn't we chat? mustn't you chat? mustn't they chat?	mustn't I be chatting? mustn't you be chatting? mustn't she be chatting? mustn't we be chatting? mustn't you be chatting? mustn't they be chatting?
Perfect	V-ing perfect
mustn't I have chatted? mustn't you have chatted? mustn't she have chatted? mustn't we have chatted? mustn't you have chatted? mustn't they have chatted?	mustn't I have been chatting? mustn't you have been chatting? mustn't she have been chatting? mustn't we have been chatting? mustn't you have been chatting? mustn't they have been chatting?