English verb conjugation
MUST SOUGH

Regular verb: sough - soughed - soughed

Affirmation

Simple form	V-ing form
I must sough you must sough he must sough we must sough you must sough they must sough	I must be soughing you must be soughing he must be soughing we must be soughing you must be soughing they must be soughing
Perfect	V-ing perfect
I must have soughed you must have soughed he must have soughed we must have soughed you must have soughed they must have soughed	I must have been soughing you must have been soughing he must have been soughing we must have been soughing you must have been soughing they must have been soughing

Negation

Simple form	V-ing form
I mustn't sough you mustn't sough he mustn't sough we mustn't sough you mustn't sough they mustn't sough	I mustn't be soughing you mustn't be soughing he mustn't be soughing we mustn't be soughing you mustn't be soughing they mustn't be soughing
Perfect	V-ing perfect
I mustn't have soughed you mustn't have soughed he mustn't have soughed we mustn't have soughed you mustn't have soughed they mustn't have soughed	I mustn't have been soughing you mustn't have been soughing he mustn't have been soughing we mustn't have been soughing you mustn't have been soughing they mustn't have been soughing

Interrogative form

Simple form	V-ing form
must I sough? must you sough? must he sough? must we sough? must you sough? must they sough?	must I be soughing? must you be soughing? must he be soughing? must we be soughing? must you be soughing? must they be soughing?
Perfect	V-ing perfect
must I have soughed? must you have soughed? must he have soughed? must we have soughed? must you have soughed? must they have soughed?	must I have been soughing? must you have been soughing? must he have been soughing? must we have been soughing? must you have been soughing? must they have been soughing?

Interro-negative form

Simple form	V-ing form
mustn't I sough? mustn't you sough? mustn't he sough? mustn't we sough? mustn't you sough? mustn't they sough?	mustn't I be soughing? mustn't you be soughing? mustn't he be soughing? mustn't we be soughing? mustn't you be soughing? mustn't they be soughing?
Perfect	V-ing perfect
mustn't I have soughed? mustn't you have soughed? mustn't he have soughed? mustn't we have soughed? mustn't you have soughed? mustn't they have soughed?	mustn't I have been soughing? mustn't you have been soughing? mustn't he have been soughing? mustn't we have been soughing? mustn't you have been soughing? mustn't they have been soughing?