English verb conjugation
MUST HOUSE-TRAIN

Regular verb: house-train - house-trained - house-trained

Affirmation

Simple form	V-ing form
I must house-train you must house-train he must house-train we must house-train you must house-train they must house-train	I must be house-training you must be house-training he must be house-training we must be house-training you must be house-training they must be house-training
Perfect	V-ing perfect
I must have house-trained you must have house-trained he must have house-trained we must have house-trained you must have house-trained they must have house-trained	I must have been house-training you must have been house-training he must have been house-training we must have been house-training you must have been house-training they must have been house-training

Negation

Simple form	V-ing form
I mustn't house-train you mustn't house-train he mustn't house-train we mustn't house-train you mustn't house-train they mustn't house-train	I mustn't be house-training you mustn't be house-training he mustn't be house-training we mustn't be house-training you mustn't be house-training they mustn't be house-training
Perfect	V-ing perfect
I mustn't have house-trained you mustn't have house-trained he mustn't have house-trained we mustn't have house-trained you mustn't have house-trained they mustn't have house-trained	I mustn't have been house-training you mustn't have been house-training he mustn't have been house-training we mustn't have been house-training you mustn't have been house-training they mustn't have been house-training

Interrogative form

Simple form	V-ing form
must I house-train? must you house-train? must he house-train? must we house-train? must you house-train? must they house-train?	must I be house-training? must you be house-training? must he be house-training? must we be house-training? must you be house-training? must they be house-training?
Perfect	V-ing perfect
must I have house-trained? must you have house-trained? must he have house-trained? must we have house-trained? must you have house-trained? must they have house-trained?	must I have been house-training? must you have been house-training? must he have been house-training? must we have been house-training? must you have been house-training? must they have been house-training?

Interro-negative form

Simple form	V-ing form
mustn't I house-train? mustn't you house-train? mustn't he house-train? mustn't we house-train? mustn't you house-train? mustn't they house-train?	mustn't I be house-training? mustn't you be house-training? mustn't he be house-training? mustn't we be house-training? mustn't you be house-training? mustn't they be house-training?
Perfect	V-ing perfect
mustn't I have house-trained? mustn't you have house-trained? mustn't he have house-trained? mustn't we have house-trained? mustn't you have house-trained? mustn't they have house-trained?	mustn't I have been house-training? mustn't you have been house-training? mustn't he have been house-training? mustn't we have been house-training? mustn't you have been house-training? mustn't they have been house-training?