English verb conjugation
MUST NIP

Regular verb: nip - nipped - nipped

Affirmation

Simple form	V-ing form
I must nip you must nip she must nip we must nip you must nip they must nip	I must be nipping you must be nipping she must be nipping we must be nipping you must be nipping they must be nipping
Perfect	V-ing perfect
I must have nipped you must have nipped she must have nipped we must have nipped you must have nipped they must have nipped	I must have been nipping you must have been nipping she must have been nipping we must have been nipping you must have been nipping they must have been nipping

Negation

Simple form	V-ing form
I mustn't nip you mustn't nip she mustn't nip we mustn't nip you mustn't nip they mustn't nip	I mustn't be nipping you mustn't be nipping she mustn't be nipping we mustn't be nipping you mustn't be nipping they mustn't be nipping
Perfect	V-ing perfect
I mustn't have nipped you mustn't have nipped she mustn't have nipped we mustn't have nipped you mustn't have nipped they mustn't have nipped	I mustn't have been nipping you mustn't have been nipping she mustn't have been nipping we mustn't have been nipping you mustn't have been nipping they mustn't have been nipping

Interrogative form

Simple form	V-ing form
must I nip? must you nip? must she nip? must we nip? must you nip? must they nip?	must I be nipping? must you be nipping? must she be nipping? must we be nipping? must you be nipping? must they be nipping?
Perfect	V-ing perfect
must I have nipped? must you have nipped? must she have nipped? must we have nipped? must you have nipped? must they have nipped?	must I have been nipping? must you have been nipping? must she have been nipping? must we have been nipping? must you have been nipping? must they have been nipping?

Interro-negative form

Simple form	V-ing form
mustn't I nip? mustn't you nip? mustn't she nip? mustn't we nip? mustn't you nip? mustn't they nip?	mustn't I be nipping? mustn't you be nipping? mustn't she be nipping? mustn't we be nipping? mustn't you be nipping? mustn't they be nipping?
Perfect	V-ing perfect
mustn't I have nipped? mustn't you have nipped? mustn't she have nipped? mustn't we have nipped? mustn't you have nipped? mustn't they have nipped?	mustn't I have been nipping? mustn't you have been nipping? mustn't she have been nipping? mustn't we have been nipping? mustn't you have been nipping? mustn't they have been nipping?