English verb conjugation
MUST KNURL

Regular verb: knurl - knurled - knurled

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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