must abuse
Regular verb: abuse - abused- abused

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must abuse
you must abuse
she must abuse
we must abuse
you must abuse
they must abuse 	I must be abusing
you must be abusing
she must be abusing
we must be abusing
you must be abusing
they must be abusing	I must have abused
you must have abused
she must have abused
we must have abused
you must have abused
they must have abused	I must have been abusing
you must have been abusing
she must have been abusing
we must have been abusing
you must have been abusing
they must have been abusing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't abuse
you mustn't abuse
she mustn't abuse
we mustn't abuse
you mustn't abuse
they mustn't abuse 	I mustn't be abusing
you mustn't be abusing
she mustn't be abusing
we mustn't be abusing
you mustn't be abusing
they mustn't be abusing	I mustn't have abused
you mustn't have abused
she mustn't have abused
we mustn't have abused
you mustn't have abused
they mustn't have abused	I mustn't have been abusing
you mustn't have been abusing
she mustn't have been abusing
we mustn't have been abusing
you mustn't have been abusing
they mustn't have been abusing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I abuse?
must you abuse?
must she abuse?
must we abuse?
must you abuse?
must they abuse? 	must I be abusing?
must you be abusing?
must she be abusing?
must we be abusing?
must you be abusing?
must they be abusing? 	must I have abused?
must you have abused?
must she have abused?
must we have abused?
must you have abused?
must they have abused? 	must I have been abusing?
must you have been abusing?
must she have been abusing?
must we have been abusing?
must you have been abusing?
must they have been abusing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I abuse?
mustn't you abuse?
mustn't she abuse?
mustn't we abuse?
mustn't you abuse?
mustn't they abuse? 	mustn't I be abusing?
mustn't you be abusing?
mustn't she be abusing?
mustn't we be abusing?
mustn't you be abusing?
mustn't they be abusing? 	mustn't I have abused?
mustn't you have abused?
mustn't she have abused?
mustn't we have abused?
mustn't you have abused?
mustn't they have abused? 	mustn't I have been abusing?
mustn't you have been abusing?
mustn't she have been abusing?
mustn't we have been abusing?
mustn't you have been abusing?
mustn't they have been abusing?