English verb conjugation
MUST ZING

Regular verb: zing - zinged - zinged

Affirmation

Simple form	V-ing form
I must zing you must zing he must zing we must zing you must zing they must zing	I must be zinging you must be zinging he must be zinging we must be zinging you must be zinging they must be zinging
Perfect	V-ing perfect
I must have zinged you must have zinged he must have zinged we must have zinged you must have zinged they must have zinged	I must have been zinging you must have been zinging he must have been zinging we must have been zinging you must have been zinging they must have been zinging

Negation

Simple form	V-ing form
I must not zing you must not zing he must not zing we must not zing you must not zing they must not zing	I must not be zinging you must not be zinging he must not be zinging we must not be zinging you must not be zinging they must not be zinging
Perfect	V-ing perfect
I must not have zinged you must not have zinged he must not have zinged we must not have zinged you must not have zinged they must not have zinged	I must not have been zinging you must not have been zinging he must not have been zinging we must not have been zinging you must not have been zinging they must not have been zinging

Interrogative form

Simple form	V-ing form
must I zing? must you zing? must he zing? must we zing? must you zing? must they zing?	must I be zinging? must you be zinging? must he be zinging? must we be zinging? must you be zinging? must they be zinging?
Perfect	V-ing perfect
must I have zinged? must you have zinged? must he have zinged? must we have zinged? must you have zinged? must they have zinged?	must I have been zinging? must you have been zinging? must he have been zinging? must we have been zinging? must you have been zinging? must they have been zinging?

Interro-negative form

Simple form	V-ing form
must I not zing? must you not zing? must he not zing? must we not zing? must you not zing? must they not zing?	must I not be zinging? must you not be zinging? must he not be zinging? must we not be zinging? must you not be zinging? must they not be zinging?
Perfect	V-ing perfect
must I not have zinged? must you not have zinged? must he not have zinged? must we not have zinged? must you not have zinged? must they not have zinged?	must I not have been zinging? must you not have been zinging? must he not have been zinging? must we not have been zinging? must you not have been zinging? must they not have been zinging?