English verb conjugation
MUST KNACKER

Regular verb: knacker - knackered - knackered

Affirmation

Simple form	V-ing form
I must knacker you must knacker she must knacker we must knacker you must knacker they must knacker	I must be knackering you must be knackering she 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 she 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 she 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 mustn't knacker you mustn't knacker she mustn't knacker we mustn't knacker you mustn't knacker they mustn't knacker	I mustn't be knackering you mustn't be knackering she mustn't be knackering we mustn't be knackering you mustn't be knackering they mustn't be knackering
Perfect	V-ing perfect
I mustn't have knackered you mustn't have knackered she mustn't have knackered we mustn't have knackered you mustn't have knackered they mustn't have knackered	I mustn't have been knackering you mustn't have been knackering she mustn't have been knackering we mustn't have been knackering you mustn't have been knackering they mustn't have been knackering

Interrogative form

Simple form	V-ing form
must I knacker? must you knacker? must she knacker? must we knacker? must you knacker? must they knacker?	must I be knackering? must you be knackering? must she 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 she 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 she 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
mustn't I knacker? mustn't you knacker? mustn't she knacker? mustn't we knacker? mustn't you knacker? mustn't they knacker?	mustn't I be knackering? mustn't you be knackering? mustn't she be knackering? mustn't we be knackering? mustn't you be knackering? mustn't they be knackering?
Perfect	V-ing perfect
mustn't I have knackered? mustn't you have knackered? mustn't she have knackered? mustn't we have knackered? mustn't you have knackered? mustn't they have knackered?	mustn't I have been knackering? mustn't you have been knackering? mustn't she have been knackering? mustn't we have been knackering? mustn't you have been knackering? mustn't they have been knackering?