English verb conjugation
MUST EXPLAIN

Regular verb: explain - explained - explained

Affirmation

Simple form	V-ing form
I must explain you must explain he must explain we must explain you must explain they must explain	I must be explaining you must be explaining he must be explaining we must be explaining you must be explaining they must be explaining
Perfect	V-ing perfect
I must have explained you must have explained he must have explained we must have explained you must have explained they must have explained	I must have been explaining you must have been explaining he must have been explaining we must have been explaining you must have been explaining they must have been explaining

Negation

Simple form	V-ing form
I must not explain you must not explain he must not explain we must not explain you must not explain they must not explain	I must not be explaining you must not be explaining he must not be explaining we must not be explaining you must not be explaining they must not be explaining
Perfect	V-ing perfect
I must not have explained you must not have explained he must not have explained we must not have explained you must not have explained they must not have explained	I must not have been explaining you must not have been explaining he must not have been explaining we must not have been explaining you must not have been explaining they must not have been explaining

Interrogative form

Simple form	V-ing form
must I explain? must you explain? must he explain? must we explain? must you explain? must they explain?	must I be explaining? must you be explaining? must he be explaining? must we be explaining? must you be explaining? must they be explaining?
Perfect	V-ing perfect
must I have explained? must you have explained? must he have explained? must we have explained? must you have explained? must they have explained?	must I have been explaining? must you have been explaining? must he have been explaining? must we have been explaining? must you have been explaining? must they have been explaining?

Interro-negative form

Simple form	V-ing form
must I not explain? must you not explain? must he not explain? must we not explain? must you not explain? must they not explain?	must I not be explaining? must you not be explaining? must he not be explaining? must we not be explaining? must you not be explaining? must they not be explaining?
Perfect	V-ing perfect
must I not have explained? must you not have explained? must he not have explained? must we not have explained? must you not have explained? must they not have explained?	must I not have been explaining? must you not have been explaining? must he not have been explaining? must we not have been explaining? must you not have been explaining? must they not have been explaining?