I must strip you must strip she must strip we must strip you must strip they must strip
V-ing form
I must be stripping you must be stripping she must be stripping we must be stripping you must be stripping they must be stripping
Perfect
I must have stripped you must have stripped she must have stripped we must have stripped you must have stripped they must have stripped
V-ing perfect
I must have been stripping you must have been stripping she must have been stripping we must have been stripping you must have been stripping they must have been stripping
Negation
Simple form
I must not strip you must not strip she must not strip we must not strip you must not strip they must not strip
V-ing form
I must not be stripping you must not be stripping she must not be stripping we must not be stripping you must not be stripping they must not be stripping
Perfect
I must not have stripped you must not have stripped she must not have stripped we must not have stripped you must not have stripped they must not have stripped
V-ing perfect
I must not have been stripping you must not have been stripping she must not have been stripping we must not have been stripping you must not have been stripping they must not have been stripping
Interrogative form
Simple form
must I strip? must you strip? must she strip? must we strip? must you strip? must they strip?
V-ing form
must I be stripping? must you be stripping? must she be stripping? must we be stripping? must you be stripping? must they be stripping?
Perfect
must I have stripped? must you have stripped? must she have stripped? must we have stripped? must you have stripped? must they have stripped?
V-ing perfect
must I have been stripping? must you have been stripping? must she have been stripping? must we have been stripping? must you have been stripping? must they have been stripping?
Interro-negative form
Simple form
must I not strip? must you not strip? must she not strip? must we not strip? must you not strip? must they not strip?
V-ing form
must I not be stripping? must you not be stripping? must she not be stripping? must we not be stripping? must you not be stripping? must they not be stripping?
Perfect
must I not have stripped? must you not have stripped? must she not have stripped? must we not have stripped? must you not have stripped? must they not have stripped?
V-ing perfect
must I not have been stripping? must you not have been stripping? must she not have been stripping? must we not have been stripping? must you not have been stripping? must they not have been stripping?