English verb conjugation
MUST FRIBBLE

Regular verb: fribble - fribbled - fribbled

Affirmation

Simple form	V-ing form
I must fribble you must fribble she must fribble we must fribble you must fribble they must fribble	I must be fribbling you must be fribbling she must be fribbling we must be fribbling you must be fribbling they must be fribbling
Perfect	V-ing perfect
I must have fribbled you must have fribbled she must have fribbled we must have fribbled you must have fribbled they must have fribbled	I must have been fribbling you must have been fribbling she must have been fribbling we must have been fribbling you must have been fribbling they must have been fribbling

Negation

Simple form	V-ing form
I must not fribble you must not fribble she must not fribble we must not fribble you must not fribble they must not fribble	I must not be fribbling you must not be fribbling she must not be fribbling we must not be fribbling you must not be fribbling they must not be fribbling
Perfect	V-ing perfect
I must not have fribbled you must not have fribbled she must not have fribbled we must not have fribbled you must not have fribbled they must not have fribbled	I must not have been fribbling you must not have been fribbling she must not have been fribbling we must not have been fribbling you must not have been fribbling they must not have been fribbling

Interrogative form

Simple form	V-ing form
must I fribble? must you fribble? must she fribble? must we fribble? must you fribble? must they fribble?	must I be fribbling? must you be fribbling? must she be fribbling? must we be fribbling? must you be fribbling? must they be fribbling?
Perfect	V-ing perfect
must I have fribbled? must you have fribbled? must she have fribbled? must we have fribbled? must you have fribbled? must they have fribbled?	must I have been fribbling? must you have been fribbling? must she have been fribbling? must we have been fribbling? must you have been fribbling? must they have been fribbling?

Interro-negative form

Simple form	V-ing form
must I not fribble? must you not fribble? must she not fribble? must we not fribble? must you not fribble? must they not fribble?	must I not be fribbling? must you not be fribbling? must she not be fribbling? must we not be fribbling? must you not be fribbling? must they not be fribbling?
Perfect	V-ing perfect
must I not have fribbled? must you not have fribbled? must she not have fribbled? must we not have fribbled? must you not have fribbled? must they not have fribbled?	must I not have been fribbling? must you not have been fribbling? must she not have been fribbling? must we not have been fribbling? must you not have been fribbling? must they not have been fribbling?