English verb conjugation
MUST FOCUS

Regular verb: focus - focused - focused

Affirmation

Simple form	V-ing form
I must focus you must focus she must focus we must focus you must focus they must focus	I must be focusing you must be focusing she must be focusing we must be focusing you must be focusing they must be focusing
Perfect	V-ing perfect
I must have focused you must have focused she must have focused we must have focused you must have focused they must have focused	I must have been focusing you must have been focusing she must have been focusing we must have been focusing you must have been focusing they must have been focusing

Negation

Simple form	V-ing form
I mustn't focus you mustn't focus she mustn't focus we mustn't focus you mustn't focus they mustn't focus	I mustn't be focusing you mustn't be focusing she mustn't be focusing we mustn't be focusing you mustn't be focusing they mustn't be focusing
Perfect	V-ing perfect
I mustn't have focused you mustn't have focused she mustn't have focused we mustn't have focused you mustn't have focused they mustn't have focused	I mustn't have been focusing you mustn't have been focusing she mustn't have been focusing we mustn't have been focusing you mustn't have been focusing they mustn't have been focusing

Interrogative form

Simple form	V-ing form
must I focus? must you focus? must she focus? must we focus? must you focus? must they focus?	must I be focusing? must you be focusing? must she be focusing? must we be focusing? must you be focusing? must they be focusing?
Perfect	V-ing perfect
must I have focused? must you have focused? must she have focused? must we have focused? must you have focused? must they have focused?	must I have been focusing? must you have been focusing? must she have been focusing? must we have been focusing? must you have been focusing? must they have been focusing?

Interro-negative form

Simple form	V-ing form
mustn't I focus? mustn't you focus? mustn't she focus? mustn't we focus? mustn't you focus? mustn't they focus?	mustn't I be focusing? mustn't you be focusing? mustn't she be focusing? mustn't we be focusing? mustn't you be focusing? mustn't they be focusing?
Perfect	V-ing perfect
mustn't I have focused? mustn't you have focused? mustn't she have focused? mustn't we have focused? mustn't you have focused? mustn't they have focused?	mustn't I have been focusing? mustn't you have been focusing? mustn't she have been focusing? mustn't we have been focusing? mustn't you have been focusing? mustn't they have been focusing?