English verb conjugation
MUST CORRUGATE

Regular verb: corrugate - corrugated - corrugated

Affirmation

Simple form	V-ing form
I must corrugate you must corrugate she must corrugate we must corrugate you must corrugate they must corrugate	I must be corrugating you must be corrugating she must be corrugating we must be corrugating you must be corrugating they must be corrugating
Perfect	V-ing perfect
I must have corrugated you must have corrugated she must have corrugated we must have corrugated you must have corrugated they must have corrugated	I must have been corrugating you must have been corrugating she must have been corrugating we must have been corrugating you must have been corrugating they must have been corrugating

Negation

Simple form	V-ing form
I must not corrugate you must not corrugate she must not corrugate we must not corrugate you must not corrugate they must not corrugate	I must not be corrugating you must not be corrugating she must not be corrugating we must not be corrugating you must not be corrugating they must not be corrugating
Perfect	V-ing perfect
I must not have corrugated you must not have corrugated she must not have corrugated we must not have corrugated you must not have corrugated they must not have corrugated	I must not have been corrugating you must not have been corrugating she must not have been corrugating we must not have been corrugating you must not have been corrugating they must not have been corrugating

Interrogative form

Simple form	V-ing form
must I corrugate? must you corrugate? must she corrugate? must we corrugate? must you corrugate? must they corrugate?	must I be corrugating? must you be corrugating? must she be corrugating? must we be corrugating? must you be corrugating? must they be corrugating?
Perfect	V-ing perfect
must I have corrugated? must you have corrugated? must she have corrugated? must we have corrugated? must you have corrugated? must they have corrugated?	must I have been corrugating? must you have been corrugating? must she have been corrugating? must we have been corrugating? must you have been corrugating? must they have been corrugating?

Interro-negative form

Simple form	V-ing form
must I not corrugate? must you not corrugate? must she not corrugate? must we not corrugate? must you not corrugate? must they not corrugate?	must I not be corrugating? must you not be corrugating? must she not be corrugating? must we not be corrugating? must you not be corrugating? must they not be corrugating?
Perfect	V-ing perfect
must I not have corrugated? must you not have corrugated? must she not have corrugated? must we not have corrugated? must you not have corrugated? must they not have corrugated?	must I not have been corrugating? must you not have been corrugating? must she not have been corrugating? must we not have been corrugating? must you not have been corrugating? must they not have been corrugating?