English verb conjugation
MUST YACHT

Regular verb: yacht - yachted - yachted

Affirmation

Simple form	V-ing form
I must yacht you must yacht he must yacht we must yacht you must yacht they must yacht	I must be yachting you must be yachting he must be yachting we must be yachting you must be yachting they must be yachting
Perfect	V-ing perfect
I must have yachted you must have yachted he must have yachted we must have yachted you must have yachted they must have yachted	I must have been yachting you must have been yachting he must have been yachting we must have been yachting you must have been yachting they must have been yachting

Negation

Simple form	V-ing form
I mustn't yacht you mustn't yacht he mustn't yacht we mustn't yacht you mustn't yacht they mustn't yacht	I mustn't be yachting you mustn't be yachting he mustn't be yachting we mustn't be yachting you mustn't be yachting they mustn't be yachting
Perfect	V-ing perfect
I mustn't have yachted you mustn't have yachted he mustn't have yachted we mustn't have yachted you mustn't have yachted they mustn't have yachted	I mustn't have been yachting you mustn't have been yachting he mustn't have been yachting we mustn't have been yachting you mustn't have been yachting they mustn't have been yachting

Interrogative form

Simple form	V-ing form
must I yacht? must you yacht? must he yacht? must we yacht? must you yacht? must they yacht?	must I be yachting? must you be yachting? must he be yachting? must we be yachting? must you be yachting? must they be yachting?
Perfect	V-ing perfect
must I have yachted? must you have yachted? must he have yachted? must we have yachted? must you have yachted? must they have yachted?	must I have been yachting? must you have been yachting? must he have been yachting? must we have been yachting? must you have been yachting? must they have been yachting?

Interro-negative form

Simple form	V-ing form
mustn't I yacht? mustn't you yacht? mustn't he yacht? mustn't we yacht? mustn't you yacht? mustn't they yacht?	mustn't I be yachting? mustn't you be yachting? mustn't he be yachting? mustn't we be yachting? mustn't you be yachting? mustn't they be yachting?
Perfect	V-ing perfect
mustn't I have yachted? mustn't you have yachted? mustn't he have yachted? mustn't we have yachted? mustn't you have yachted? mustn't they have yachted?	mustn't I have been yachting? mustn't you have been yachting? mustn't he have been yachting? mustn't we have been yachting? mustn't you have been yachting? mustn't they have been yachting?