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 he 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 he 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 he 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 he 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 mustn't cross-check you mustn't cross-check he mustn't cross-check we mustn't cross-check you mustn't cross-check they mustn't cross-check	I mustn't be cross-checking you mustn't be cross-checking he mustn't be cross-checking we mustn't be cross-checking you mustn't be cross-checking they mustn't be cross-checking
Perfect	V-ing perfect
I mustn't have cross-checked you mustn't have cross-checked he mustn't have cross-checked we mustn't have cross-checked you mustn't have cross-checked they mustn't have cross-checked	I mustn't have been cross-checking you mustn't have been cross-checking he mustn't have been cross-checking we mustn't have been cross-checking you mustn't have been cross-checking they mustn't have been cross-checking

Interrogative form

Simple form	V-ing form
must I cross-check? must you cross-check? must he 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 he 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 he 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 he 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
mustn't I cross-check? mustn't you cross-check? mustn't he cross-check? mustn't we cross-check? mustn't you cross-check? mustn't they cross-check?	mustn't I be cross-checking? mustn't you be cross-checking? mustn't he be cross-checking? mustn't we be cross-checking? mustn't you be cross-checking? mustn't they be cross-checking?
Perfect	V-ing perfect
mustn't I have cross-checked? mustn't you have cross-checked? mustn't he have cross-checked? mustn't we have cross-checked? mustn't you have cross-checked? mustn't they have cross-checked?	mustn't I have been cross-checking? mustn't you have been cross-checking? mustn't he have been cross-checking? mustn't we have been cross-checking? mustn't you have been cross-checking? mustn't they have been cross-checking?