English verb conjugation
MUST DETAIN

Regular verb: detain - detained - detained

Affirmation

Simple form	V-ing form
I must detain you must detain she must detain we must detain you must detain they must detain	I must be detaining you must be detaining she must be detaining we must be detaining you must be detaining they must be detaining
Perfect	V-ing perfect
I must have detained you must have detained she must have detained we must have detained you must have detained they must have detained	I must have been detaining you must have been detaining she must have been detaining we must have been detaining you must have been detaining they must have been detaining

Negation

Simple form	V-ing form
I mustn't detain you mustn't detain she mustn't detain we mustn't detain you mustn't detain they mustn't detain	I mustn't be detaining you mustn't be detaining she mustn't be detaining we mustn't be detaining you mustn't be detaining they mustn't be detaining
Perfect	V-ing perfect
I mustn't have detained you mustn't have detained she mustn't have detained we mustn't have detained you mustn't have detained they mustn't have detained	I mustn't have been detaining you mustn't have been detaining she mustn't have been detaining we mustn't have been detaining you mustn't have been detaining they mustn't have been detaining

Interrogative form

Simple form	V-ing form
must I detain? must you detain? must she detain? must we detain? must you detain? must they detain?	must I be detaining? must you be detaining? must she be detaining? must we be detaining? must you be detaining? must they be detaining?
Perfect	V-ing perfect
must I have detained? must you have detained? must she have detained? must we have detained? must you have detained? must they have detained?	must I have been detaining? must you have been detaining? must she have been detaining? must we have been detaining? must you have been detaining? must they have been detaining?

Interro-negative form

Simple form	V-ing form
mustn't I detain? mustn't you detain? mustn't she detain? mustn't we detain? mustn't you detain? mustn't they detain?	mustn't I be detaining? mustn't you be detaining? mustn't she be detaining? mustn't we be detaining? mustn't you be detaining? mustn't they be detaining?
Perfect	V-ing perfect
mustn't I have detained? mustn't you have detained? mustn't she have detained? mustn't we have detained? mustn't you have detained? mustn't they have detained?	mustn't I have been detaining? mustn't you have been detaining? mustn't she have been detaining? mustn't we have been detaining? mustn't you have been detaining? mustn't they have been detaining?