English verb conjugation
CAN KNURL

Regular verb: knurl - knurled - knurled

Affirmation

Simple form	V-ing form
I can knurl you can knurl he can knurl we can knurl you can knurl they can knurl	I can be knurling you can be knurling he can be knurling we can be knurling you can be knurling they can be knurling
Perfect	V-ing perfect
I can have knurled you can have knurled he can have knurled we can have knurled you can have knurled they can have knurled	I can have been knurling you can have been knurling he can have been knurling we can have been knurling you can have been knurling they can have been knurling

Negation

Simple form	V-ing form
I cannot knurl you cannot knurl he cannot knurl we cannot knurl you cannot knurl they cannot knurl	I cannot be knurling you cannot be knurling he cannot be knurling we cannot be knurling you cannot be knurling they cannot be knurling
Perfect	V-ing perfect
I cannot have knurled you cannot have knurled he cannot have knurled we cannot have knurled you cannot have knurled they cannot have knurled	I cannot have been knurling you cannot have been knurling he cannot have been knurling we cannot have been knurling you cannot have been knurling they cannot have been knurling

Interrogative form

Simple form	V-ing form
can I knurl? can you knurl? can he knurl? can we knurl? can you knurl? can they knurl?	can I be knurling? can you be knurling? can he be knurling? can we be knurling? can you be knurling? can they be knurling?
Perfect	V-ing perfect
can I have knurled? can you have knurled? can he have knurled? can we have knurled? can you have knurled? can they have knurled?	can I have been knurling? can you have been knurling? can he have been knurling? can we have been knurling? can you have been knurling? can they have been knurling?

Interro-negative form

Simple form	V-ing form
can I not knurl? can you not knurl? can he not knurl? can we not knurl? can you not knurl? can they not knurl?	can I not be knurling? can you not be knurling? can he not be knurling? can we not be knurling? can you not be knurling? can they not be knurling?
Perfect	V-ing perfect
can I not have knurled? can you not have knurled? can he not have knurled? can we not have knurled? can you not have knurled? can they not have knurled?	can I not have been knurling? can you not have been knurling? can he not have been knurling? can we not have been knurling? can you not have been knurling? can they not have been knurling?