English verb conjugation
MUST CRUSH

Regular verb: crush - crushed - crushed

Affirmation

Simple form	V-ing form
I must crush you must crush she must crush we must crush you must crush they must crush	I must be crushing you must be crushing she must be crushing we must be crushing you must be crushing they must be crushing
Perfect	V-ing perfect
I must have crushed you must have crushed she must have crushed we must have crushed you must have crushed they must have crushed	I must have been crushing you must have been crushing she must have been crushing we must have been crushing you must have been crushing they must have been crushing

Negation

Simple form	V-ing form
I mustn't crush you mustn't crush she mustn't crush we mustn't crush you mustn't crush they mustn't crush	I mustn't be crushing you mustn't be crushing she mustn't be crushing we mustn't be crushing you mustn't be crushing they mustn't be crushing
Perfect	V-ing perfect
I mustn't have crushed you mustn't have crushed she mustn't have crushed we mustn't have crushed you mustn't have crushed they mustn't have crushed	I mustn't have been crushing you mustn't have been crushing she mustn't have been crushing we mustn't have been crushing you mustn't have been crushing they mustn't have been crushing

Interrogative form

Simple form	V-ing form
must I crush? must you crush? must she crush? must we crush? must you crush? must they crush?	must I be crushing? must you be crushing? must she be crushing? must we be crushing? must you be crushing? must they be crushing?
Perfect	V-ing perfect
must I have crushed? must you have crushed? must she have crushed? must we have crushed? must you have crushed? must they have crushed?	must I have been crushing? must you have been crushing? must she have been crushing? must we have been crushing? must you have been crushing? must they have been crushing?

Interro-negative form

Simple form	V-ing form
mustn't I crush? mustn't you crush? mustn't she crush? mustn't we crush? mustn't you crush? mustn't they crush?	mustn't I be crushing? mustn't you be crushing? mustn't she be crushing? mustn't we be crushing? mustn't you be crushing? mustn't they be crushing?
Perfect	V-ing perfect
mustn't I have crushed? mustn't you have crushed? mustn't she have crushed? mustn't we have crushed? mustn't you have crushed? mustn't they have crushed?	mustn't I have been crushing? mustn't you have been crushing? mustn't she have been crushing? mustn't we have been crushing? mustn't you have been crushing? mustn't they have been crushing?