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