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 can't knurl you can't knurl he can't knurl we can't knurl you can't knurl they can't knurl	I can't be knurling you can't be knurling he can't be knurling we can't be knurling you can't be knurling they can't be knurling
Perfect	V-ing perfect
I can't have knurled you can't have knurled he can't have knurled we can't have knurled you can't have knurled they can't have knurled	I can't have been knurling you can't have been knurling he can't have been knurling we can't have been knurling you can't have been knurling they can't 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't I knurl? can't you knurl? can't he knurl? can't we knurl? can't you knurl? can't they knurl?	can't I be knurling? can't you be knurling? can't he be knurling? can't we be knurling? can't you be knurling? can't they be knurling?
Perfect	V-ing perfect
can't I have knurled? can't you have knurled? can't he have knurled? can't we have knurled? can't you have knurled? can't they have knurled?	can't I have been knurling? can't you have been knurling? can't he have been knurling? can't we have been knurling? can't you have been knurling? can't they have been knurling?