I must knit you must knit he must knit we must knit you must knit they must knit
V-ing form
I must be knitting you must be knitting he must be knitting we must be knitting you must be knitting they must be knitting
Perfect
I must have knitted, knit you must have knitted, knit he must have knitted, knit we must have knitted, knit you must have knitted, knit they must have knitted, knit
V-ing perfect
I must have been knitting you must have been knitting he must have been knitting we must have been knitting you must have been knitting they must have been knitting
Negation
Simple form
I must not knit you must not knit he must not knit we must not knit you must not knit they must not knit
V-ing form
I must not be knitting you must not be knitting he must not be knitting we must not be knitting you must not be knitting they must not be knitting
Perfect
I must not have knitted, knit you must not have knitted, knit he must not have knitted, knit we must not have knitted, knit you must not have knitted, knit they must not have knitted, knit
V-ing perfect
I must not have been knitting you must not have been knitting he must not have been knitting we must not have been knitting you must not have been knitting they must not have been knitting
Interrogative form
Simple form
must I knit? must you knit? must he knit? must we knit? must you knit? must they knit?
V-ing form
must I be knitting? must you be knitting? must he be knitting? must we be knitting? must you be knitting? must they be knitting?
Perfect
must I have knitted, knit? must you have knitted, knit? must he have knitted, knit? must we have knitted, knit? must you have knitted, knit? must they have knitted, knit?
V-ing perfect
must I have been knitting? must you have been knitting? must he have been knitting? must we have been knitting? must you have been knitting? must they have been knitting?
Interro-negative form
Simple form
must I not knit? must you not knit? must he not knit? must we not knit? must you not knit? must they not knit?
V-ing form
must I not be knitting? must you not be knitting? must he not be knitting? must we not be knitting? must you not be knitting? must they not be knitting?
Perfect
must I not have knitted, knit? must you not have knitted, knit? must he not have knitted, knit? must we not have knitted, knit? must you not have knitted, knit? must they not have knitted, knit?
V-ing perfect
must I not have been knitting? must you not have been knitting? must he not have been knitting? must we not have been knitting? must you not have been knitting? must they not have been knitting?