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