English verb conjugation
MUST KNACKER

Regular verb: knacker - knackered - knackered

Affirmation

Simple form	V-ing form
I must knacker you must knacker he must knacker we must knacker you must knacker they must knacker	I must be knackering you must be knackering he must be knackering we must be knackering you must be knackering they must be knackering
Perfect	V-ing perfect
I must have knackered you must have knackered he must have knackered we must have knackered you must have knackered they must have knackered	I must have been knackering you must have been knackering he must have been knackering we must have been knackering you must have been knackering they must have been knackering

Negation

Simple form	V-ing form
I must not knacker you must not knacker he must not knacker we must not knacker you must not knacker they must not knacker	I must not be knackering you must not be knackering he must not be knackering we must not be knackering you must not be knackering they must not be knackering
Perfect	V-ing perfect
I must not have knackered you must not have knackered he must not have knackered we must not have knackered you must not have knackered they must not have knackered	I must not have been knackering you must not have been knackering he must not have been knackering we must not have been knackering you must not have been knackering they must not have been knackering

Interrogative form

Simple form	V-ing form
must I knacker? must you knacker? must he knacker? must we knacker? must you knacker? must they knacker?	must I be knackering? must you be knackering? must he be knackering? must we be knackering? must you be knackering? must they be knackering?
Perfect	V-ing perfect
must I have knackered? must you have knackered? must he have knackered? must we have knackered? must you have knackered? must they have knackered?	must I have been knackering? must you have been knackering? must he have been knackering? must we have been knackering? must you have been knackering? must they have been knackering?

Interro-negative form

Simple form	V-ing form
must I not knacker? must you not knacker? must he not knacker? must we not knacker? must you not knacker? must they not knacker?	must I not be knackering? must you not be knackering? must he not be knackering? must we not be knackering? must you not be knackering? must they not be knackering?
Perfect	V-ing perfect
must I not have knackered? must you not have knackered? must he not have knackered? must we not have knackered? must you not have knackered? must they not have knackered?	must I not have been knackering? must you not have been knackering? must he not have been knackering? must we not have been knackering? must you not have been knackering? must they not have been knackering?