English verb conjugation
MUST SKATE

Regular verb: skate - skated - skated

Affirmation

Simple form	V-ing form
I must skate you must skate she must skate we must skate you must skate they must skate	I must be skating you must be skating she must be skating we must be skating you must be skating they must be skating
Perfect	V-ing perfect
I must have skated you must have skated she must have skated we must have skated you must have skated they must have skated	I must have been skating you must have been skating she must have been skating we must have been skating you must have been skating they must have been skating

Negation

Simple form	V-ing form
I mustn't skate you mustn't skate she mustn't skate we mustn't skate you mustn't skate they mustn't skate	I mustn't be skating you mustn't be skating she mustn't be skating we mustn't be skating you mustn't be skating they mustn't be skating
Perfect	V-ing perfect
I mustn't have skated you mustn't have skated she mustn't have skated we mustn't have skated you mustn't have skated they mustn't have skated	I mustn't have been skating you mustn't have been skating she mustn't have been skating we mustn't have been skating you mustn't have been skating they mustn't have been skating

Interrogative form

Simple form	V-ing form
must I skate? must you skate? must she skate? must we skate? must you skate? must they skate?	must I be skating? must you be skating? must she be skating? must we be skating? must you be skating? must they be skating?
Perfect	V-ing perfect
must I have skated? must you have skated? must she have skated? must we have skated? must you have skated? must they have skated?	must I have been skating? must you have been skating? must she have been skating? must we have been skating? must you have been skating? must they have been skating?

Interro-negative form

Simple form	V-ing form
mustn't I skate? mustn't you skate? mustn't she skate? mustn't we skate? mustn't you skate? mustn't they skate?	mustn't I be skating? mustn't you be skating? mustn't she be skating? mustn't we be skating? mustn't you be skating? mustn't they be skating?
Perfect	V-ing perfect
mustn't I have skated? mustn't you have skated? mustn't she have skated? mustn't we have skated? mustn't you have skated? mustn't they have skated?	mustn't I have been skating? mustn't you have been skating? mustn't she have been skating? mustn't we have been skating? mustn't you have been skating? mustn't they have been skating?