English verb conjugation
MUST TREBLE

Regular verb: treble - trebled - trebled

Affirmation

Simple form	V-ing form
I must treble you must treble she must treble we must treble you must treble they must treble	I must be trebling you must be trebling she must be trebling we must be trebling you must be trebling they must be trebling
Perfect	V-ing perfect
I must have trebled you must have trebled she must have trebled we must have trebled you must have trebled they must have trebled	I must have been trebling you must have been trebling she must have been trebling we must have been trebling you must have been trebling they must have been trebling

Negation

Simple form	V-ing form
I mustn't treble you mustn't treble she mustn't treble we mustn't treble you mustn't treble they mustn't treble	I mustn't be trebling you mustn't be trebling she mustn't be trebling we mustn't be trebling you mustn't be trebling they mustn't be trebling
Perfect	V-ing perfect
I mustn't have trebled you mustn't have trebled she mustn't have trebled we mustn't have trebled you mustn't have trebled they mustn't have trebled	I mustn't have been trebling you mustn't have been trebling she mustn't have been trebling we mustn't have been trebling you mustn't have been trebling they mustn't have been trebling

Interrogative form

Simple form	V-ing form
must I treble? must you treble? must she treble? must we treble? must you treble? must they treble?	must I be trebling? must you be trebling? must she be trebling? must we be trebling? must you be trebling? must they be trebling?
Perfect	V-ing perfect
must I have trebled? must you have trebled? must she have trebled? must we have trebled? must you have trebled? must they have trebled?	must I have been trebling? must you have been trebling? must she have been trebling? must we have been trebling? must you have been trebling? must they have been trebling?

Interro-negative form

Simple form	V-ing form
mustn't I treble? mustn't you treble? mustn't she treble? mustn't we treble? mustn't you treble? mustn't they treble?	mustn't I be trebling? mustn't you be trebling? mustn't she be trebling? mustn't we be trebling? mustn't you be trebling? mustn't they be trebling?
Perfect	V-ing perfect
mustn't I have trebled? mustn't you have trebled? mustn't she have trebled? mustn't we have trebled? mustn't you have trebled? mustn't they have trebled?	mustn't I have been trebling? mustn't you have been trebling? mustn't she have been trebling? mustn't we have been trebling? mustn't you have been trebling? mustn't they have been trebling?