English verb conjugation
MUST CROSS-CHECK

Regular verb: cross-check - cross-checked - cross-checked

Affirmation

Simple form	V-ing form
I must cross-check you must cross-check she must cross-check we must cross-check you must cross-check they must cross-check	I must be cross-checking you must be cross-checking she must be cross-checking we must be cross-checking you must be cross-checking they must be cross-checking
Perfect	V-ing perfect
I must have cross-checked you must have cross-checked she must have cross-checked we must have cross-checked you must have cross-checked they must have cross-checked	I must have been cross-checking you must have been cross-checking she must have been cross-checking we must have been cross-checking you must have been cross-checking they must have been cross-checking

Negation

Simple form	V-ing form
I must not cross-check you must not cross-check she must not cross-check we must not cross-check you must not cross-check they must not cross-check	I must not be cross-checking you must not be cross-checking she must not be cross-checking we must not be cross-checking you must not be cross-checking they must not be cross-checking
Perfect	V-ing perfect
I must not have cross-checked you must not have cross-checked she must not have cross-checked we must not have cross-checked you must not have cross-checked they must not have cross-checked	I must not have been cross-checking you must not have been cross-checking she must not have been cross-checking we must not have been cross-checking you must not have been cross-checking they must not have been cross-checking

Interrogative form

Simple form	V-ing form
must I cross-check? must you cross-check? must she cross-check? must we cross-check? must you cross-check? must they cross-check?	must I be cross-checking? must you be cross-checking? must she be cross-checking? must we be cross-checking? must you be cross-checking? must they be cross-checking?
Perfect	V-ing perfect
must I have cross-checked? must you have cross-checked? must she have cross-checked? must we have cross-checked? must you have cross-checked? must they have cross-checked?	must I have been cross-checking? must you have been cross-checking? must she have been cross-checking? must we have been cross-checking? must you have been cross-checking? must they have been cross-checking?

Interro-negative form

Simple form	V-ing form
must I not cross-check? must you not cross-check? must she not cross-check? must we not cross-check? must you not cross-check? must they not cross-check?	must I not be cross-checking? must you not be cross-checking? must she not be cross-checking? must we not be cross-checking? must you not be cross-checking? must they not be cross-checking?
Perfect	V-ing perfect
must I not have cross-checked? must you not have cross-checked? must she not have cross-checked? must we not have cross-checked? must you not have cross-checked? must they not have cross-checked?	must I not have been cross-checking? must you not have been cross-checking? must she not have been cross-checking? must we not have been cross-checking? must you not have been cross-checking? must they not have been cross-checking?