English verb conjugation
MUST EXPRESS

Regular verb: express - expressed - expressed

Affirmation

Simple form	V-ing form
I must express you must express she must express we must express you must express they must express	I must be expressing you must be expressing she 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 she 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 she 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 she 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 she 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 she 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 she 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 she express? must we express? must you express? must they express?	must I be expressing? must you be expressing? must she 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 she 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 she 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 she 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 she 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 she 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 she have been expressing? mustn't we have been expressing? mustn't you have been expressing? mustn't they have been expressing?