I must precipitate you must precipitate she must precipitate we must precipitate you must precipitate they must precipitate
V-ing form
I must be precipitating you must be precipitating she must be precipitating we must be precipitating you must be precipitating they must be precipitating
Perfect
I must have precipitated you must have precipitated she must have precipitated we must have precipitated you must have precipitated they must have precipitated
V-ing perfect
I must have been precipitating you must have been precipitating she must have been precipitating we must have been precipitating you must have been precipitating they must have been precipitating
Negation
Simple form
I mustn't precipitate you mustn't precipitate she mustn't precipitate we mustn't precipitate you mustn't precipitate they mustn't precipitate
V-ing form
I mustn't be precipitating you mustn't be precipitating she mustn't be precipitating we mustn't be precipitating you mustn't be precipitating they mustn't be precipitating
Perfect
I mustn't have precipitated you mustn't have precipitated she mustn't have precipitated we mustn't have precipitated you mustn't have precipitated they mustn't have precipitated
V-ing perfect
I mustn't have been precipitating you mustn't have been precipitating she mustn't have been precipitating we mustn't have been precipitating you mustn't have been precipitating they mustn't have been precipitating
Interrogative form
Simple form
must I precipitate? must you precipitate? must she precipitate? must we precipitate? must you precipitate? must they precipitate?
V-ing form
must I be precipitating? must you be precipitating? must she be precipitating? must we be precipitating? must you be precipitating? must they be precipitating?
Perfect
must I have precipitated? must you have precipitated? must she have precipitated? must we have precipitated? must you have precipitated? must they have precipitated?
V-ing perfect
must I have been precipitating? must you have been precipitating? must she have been precipitating? must we have been precipitating? must you have been precipitating? must they have been precipitating?
Interro-negative form
Simple form
mustn't I precipitate? mustn't you precipitate? mustn't she precipitate? mustn't we precipitate? mustn't you precipitate? mustn't they precipitate?
V-ing form
mustn't I be precipitating? mustn't you be precipitating? mustn't she be precipitating? mustn't we be precipitating? mustn't you be precipitating? mustn't they be precipitating?
Perfect
mustn't I have precipitated? mustn't you have precipitated? mustn't she have precipitated? mustn't we have precipitated? mustn't you have precipitated? mustn't they have precipitated?
V-ing perfect
mustn't I have been precipitating? mustn't you have been precipitating? mustn't she have been precipitating? mustn't we have been precipitating? mustn't you have been precipitating? mustn't they have been precipitating?