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 mustn't explain you mustn't explain he mustn't explain we mustn't explain you mustn't explain they mustn't explain	I mustn't be explaining you mustn't be explaining he mustn't be explaining we mustn't be explaining you mustn't be explaining they mustn't be explaining
Perfect	V-ing perfect
I mustn't have explained you mustn't have explained he mustn't have explained we mustn't have explained you mustn't have explained they mustn't have explained	I mustn't have been explaining you mustn't have been explaining he mustn't have been explaining we mustn't have been explaining you mustn't have been explaining they mustn't 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
mustn't I explain? mustn't you explain? mustn't he explain? mustn't we explain? mustn't you explain? mustn't they explain?	mustn't I be explaining? mustn't you be explaining? mustn't he be explaining? mustn't we be explaining? mustn't you be explaining? mustn't they be explaining?
Perfect	V-ing perfect
mustn't I have explained? mustn't you have explained? mustn't he have explained? mustn't we have explained? mustn't you have explained? mustn't they have explained?	mustn't I have been explaining? mustn't you have been explaining? mustn't he have been explaining? mustn't we have been explaining? mustn't you have been explaining? mustn't they have been explaining?