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 must not treble you must not treble she must not treble we must not treble you must not treble they must not treble	I must not be trebling you must not be trebling she must not be trebling we must not be trebling you must not be trebling they must not be trebling
Perfect	V-ing perfect
I must not have trebled you must not have trebled she must not have trebled we must not have trebled you must not have trebled they must not have trebled	I must not have been trebling you must not have been trebling she must not have been trebling we must not have been trebling you must not have been trebling they must not 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
must I not treble? must you not treble? must she not treble? must we not treble? must you not treble? must they not treble?	must I not be trebling? must you not be trebling? must she not be trebling? must we not be trebling? must you not be trebling? must they not be trebling?
Perfect	V-ing perfect
must I not have trebled? must you not have trebled? must she not have trebled? must we not have trebled? must you not have trebled? must they not have trebled?	must I not have been trebling? must you not have been trebling? must she not have been trebling? must we not have been trebling? must you not have been trebling? must they not have been trebling?