English verb conjugation
MUST STRETCH

Regular verb: stretch - stretched - stretched

Affirmation

Simple form	V-ing form
I must stretch you must stretch she must stretch we must stretch you must stretch they must stretch	I must be stretching you must be stretching she must be stretching we must be stretching you must be stretching they must be stretching
Perfect	V-ing perfect
I must have stretched you must have stretched she must have stretched we must have stretched you must have stretched they must have stretched	I must have been stretching you must have been stretching she must have been stretching we must have been stretching you must have been stretching they must have been stretching

Negation

Simple form	V-ing form
I must not stretch you must not stretch she must not stretch we must not stretch you must not stretch they must not stretch	I must not be stretching you must not be stretching she must not be stretching we must not be stretching you must not be stretching they must not be stretching
Perfect	V-ing perfect
I must not have stretched you must not have stretched she must not have stretched we must not have stretched you must not have stretched they must not have stretched	I must not have been stretching you must not have been stretching she must not have been stretching we must not have been stretching you must not have been stretching they must not have been stretching

Interrogative form

Simple form	V-ing form
must I stretch? must you stretch? must she stretch? must we stretch? must you stretch? must they stretch?	must I be stretching? must you be stretching? must she be stretching? must we be stretching? must you be stretching? must they be stretching?
Perfect	V-ing perfect
must I have stretched? must you have stretched? must she have stretched? must we have stretched? must you have stretched? must they have stretched?	must I have been stretching? must you have been stretching? must she have been stretching? must we have been stretching? must you have been stretching? must they have been stretching?

Interro-negative form

Simple form	V-ing form
must I not stretch? must you not stretch? must she not stretch? must we not stretch? must you not stretch? must they not stretch?	must I not be stretching? must you not be stretching? must she not be stretching? must we not be stretching? must you not be stretching? must they not be stretching?
Perfect	V-ing perfect
must I not have stretched? must you not have stretched? must she not have stretched? must we not have stretched? must you not have stretched? must they not have stretched?	must I not have been stretching? must you not have been stretching? must she not have been stretching? must we not have been stretching? must you not have been stretching? must they not have been stretching?