English verb conjugation
MUST HAMMER

Regular verb: hammer - hammered - hammered

Affirmation

Simple form	V-ing form
I must hammer you must hammer he must hammer we must hammer you must hammer they must hammer	I must be hammering you must be hammering he must be hammering we must be hammering you must be hammering they must be hammering
Perfect	V-ing perfect
I must have hammered you must have hammered he must have hammered we must have hammered you must have hammered they must have hammered	I must have been hammering you must have been hammering he must have been hammering we must have been hammering you must have been hammering they must have been hammering

Negation

Simple form	V-ing form
I mustn't hammer you mustn't hammer he mustn't hammer we mustn't hammer you mustn't hammer they mustn't hammer	I mustn't be hammering you mustn't be hammering he mustn't be hammering we mustn't be hammering you mustn't be hammering they mustn't be hammering
Perfect	V-ing perfect
I mustn't have hammered you mustn't have hammered he mustn't have hammered we mustn't have hammered you mustn't have hammered they mustn't have hammered	I mustn't have been hammering you mustn't have been hammering he mustn't have been hammering we mustn't have been hammering you mustn't have been hammering they mustn't have been hammering

Interrogative form

Simple form	V-ing form
must I hammer? must you hammer? must he hammer? must we hammer? must you hammer? must they hammer?	must I be hammering? must you be hammering? must he be hammering? must we be hammering? must you be hammering? must they be hammering?
Perfect	V-ing perfect
must I have hammered? must you have hammered? must he have hammered? must we have hammered? must you have hammered? must they have hammered?	must I have been hammering? must you have been hammering? must he have been hammering? must we have been hammering? must you have been hammering? must they have been hammering?

Interro-negative form

Simple form	V-ing form
mustn't I hammer? mustn't you hammer? mustn't he hammer? mustn't we hammer? mustn't you hammer? mustn't they hammer?	mustn't I be hammering? mustn't you be hammering? mustn't he be hammering? mustn't we be hammering? mustn't you be hammering? mustn't they be hammering?
Perfect	V-ing perfect
mustn't I have hammered? mustn't you have hammered? mustn't he have hammered? mustn't we have hammered? mustn't you have hammered? mustn't they have hammered?	mustn't I have been hammering? mustn't you have been hammering? mustn't he have been hammering? mustn't we have been hammering? mustn't you have been hammering? mustn't they have been hammering?