English verb conjugation
MUST EXPRESS

Regular verb: express - expressed - expressed

Affirmation

Simple form	V-ing form
I must express you must express he must express we must express you must express they must express	I must be expressing you must be expressing he must be expressing we must be expressing you must be expressing they must be expressing
Perfect	V-ing perfect
I must have expressed you must have expressed he must have expressed we must have expressed you must have expressed they must have expressed	I must have been expressing you must have been expressing he must have been expressing we must have been expressing you must have been expressing they must have been expressing

Negation

Simple form	V-ing form
I must not express you must not express he must not express we must not express you must not express they must not express	I must not be expressing you must not be expressing he must not be expressing we must not be expressing you must not be expressing they must not be expressing
Perfect	V-ing perfect
I must not have expressed you must not have expressed he must not have expressed we must not have expressed you must not have expressed they must not have expressed	I must not have been expressing you must not have been expressing he must not have been expressing we must not have been expressing you must not have been expressing they must not have been expressing

Interrogative form

Simple form	V-ing form
must I express? must you express? must he express? must we express? must you express? must they express?	must I be expressing? must you be expressing? must he be expressing? must we be expressing? must you be expressing? must they be expressing?
Perfect	V-ing perfect
must I have expressed? must you have expressed? must he have expressed? must we have expressed? must you have expressed? must they have expressed?	must I have been expressing? must you have been expressing? must he have been expressing? must we have been expressing? must you have been expressing? must they have been expressing?

Interro-negative form

Simple form	V-ing form
must I not express? must you not express? must he not express? must we not express? must you not express? must they not express?	must I not be expressing? must you not be expressing? must he not be expressing? must we not be expressing? must you not be expressing? must they not be expressing?
Perfect	V-ing perfect
must I not have expressed? must you not have expressed? must he not have expressed? must we not have expressed? must you not have expressed? must they not have expressed?	must I not have been expressing? must you not have been expressing? must he not have been expressing? must we not have been expressing? must you not have been expressing? must they not have been expressing?