English verb conjugation
MUST SIGHT

Regular verb: sight - sighted - sighted

Affirmation

Simple form	V-ing form
I must sight you must sight he must sight we must sight you must sight they must sight	I must be sighting you must be sighting he must be sighting we must be sighting you must be sighting they must be sighting
Perfect	V-ing perfect
I must have sighted you must have sighted he must have sighted we must have sighted you must have sighted they must have sighted	I must have been sighting you must have been sighting he must have been sighting we must have been sighting you must have been sighting they must have been sighting

Negation

Simple form	V-ing form
I mustn't sight you mustn't sight he mustn't sight we mustn't sight you mustn't sight they mustn't sight	I mustn't be sighting you mustn't be sighting he mustn't be sighting we mustn't be sighting you mustn't be sighting they mustn't be sighting
Perfect	V-ing perfect
I mustn't have sighted you mustn't have sighted he mustn't have sighted we mustn't have sighted you mustn't have sighted they mustn't have sighted	I mustn't have been sighting you mustn't have been sighting he mustn't have been sighting we mustn't have been sighting you mustn't have been sighting they mustn't have been sighting

Interrogative form

Simple form	V-ing form
must I sight? must you sight? must he sight? must we sight? must you sight? must they sight?	must I be sighting? must you be sighting? must he be sighting? must we be sighting? must you be sighting? must they be sighting?
Perfect	V-ing perfect
must I have sighted? must you have sighted? must he have sighted? must we have sighted? must you have sighted? must they have sighted?	must I have been sighting? must you have been sighting? must he have been sighting? must we have been sighting? must you have been sighting? must they have been sighting?

Interro-negative form

Simple form	V-ing form
mustn't I sight? mustn't you sight? mustn't he sight? mustn't we sight? mustn't you sight? mustn't they sight?	mustn't I be sighting? mustn't you be sighting? mustn't he be sighting? mustn't we be sighting? mustn't you be sighting? mustn't they be sighting?
Perfect	V-ing perfect
mustn't I have sighted? mustn't you have sighted? mustn't he have sighted? mustn't we have sighted? mustn't you have sighted? mustn't they have sighted?	mustn't I have been sighting? mustn't you have been sighting? mustn't he have been sighting? mustn't we have been sighting? mustn't you have been sighting? mustn't they have been sighting?