I must sweat you must sweat she must sweat we must sweat you must sweat they must sweat
V-ing form
I must be sweating you must be sweating she must be sweating we must be sweating you must be sweating they must be sweating
Perfect
I must have sweated you must have sweated she must have sweated we must have sweated you must have sweated they must have sweated
V-ing perfect
I must have been sweating you must have been sweating she must have been sweating we must have been sweating you must have been sweating they must have been sweating
Negation
Simple form
I must not sweat you must not sweat she must not sweat we must not sweat you must not sweat they must not sweat
V-ing form
I must not be sweating you must not be sweating she must not be sweating we must not be sweating you must not be sweating they must not be sweating
Perfect
I must not have sweated you must not have sweated she must not have sweated we must not have sweated you must not have sweated they must not have sweated
V-ing perfect
I must not have been sweating you must not have been sweating she must not have been sweating we must not have been sweating you must not have been sweating they must not have been sweating
Interrogative form
Simple form
must I sweat? must you sweat? must she sweat? must we sweat? must you sweat? must they sweat?
V-ing form
must I be sweating? must you be sweating? must she be sweating? must we be sweating? must you be sweating? must they be sweating?
Perfect
must I have sweated? must you have sweated? must she have sweated? must we have sweated? must you have sweated? must they have sweated?
V-ing perfect
must I have been sweating? must you have been sweating? must she have been sweating? must we have been sweating? must you have been sweating? must they have been sweating?
Interro-negative form
Simple form
must I not sweat? must you not sweat? must she not sweat? must we not sweat? must you not sweat? must they not sweat?
V-ing form
must I not be sweating? must you not be sweating? must she not be sweating? must we not be sweating? must you not be sweating? must they not be sweating?
Perfect
must I not have sweated? must you not have sweated? must she not have sweated? must we not have sweated? must you not have sweated? must they not have sweated?
V-ing perfect
must I not have been sweating? must you not have been sweating? must she not have been sweating? must we not have been sweating? must you not have been sweating? must they not have been sweating?