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 mustn't express you mustn't express he mustn't express we mustn't express you mustn't express they mustn't express	I mustn't be expressing you mustn't be expressing he mustn't be expressing we mustn't be expressing you mustn't be expressing they mustn't be expressing
Perfect	V-ing perfect
I mustn't have expressed you mustn't have expressed he mustn't have expressed we mustn't have expressed you mustn't have expressed they mustn't have expressed	I mustn't have been expressing you mustn't have been expressing he mustn't have been expressing we mustn't have been expressing you mustn't have been expressing they mustn't 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
mustn't I express? mustn't you express? mustn't he express? mustn't we express? mustn't you express? mustn't they express?	mustn't I be expressing? mustn't you be expressing? mustn't he be expressing? mustn't we be expressing? mustn't you be expressing? mustn't they be expressing?
Perfect	V-ing perfect
mustn't I have expressed? mustn't you have expressed? mustn't he have expressed? mustn't we have expressed? mustn't you have expressed? mustn't they have expressed?	mustn't I have been expressing? mustn't you have been expressing? mustn't he have been expressing? mustn't we have been expressing? mustn't you have been expressing? mustn't they have been expressing?