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 mustn't stretch you mustn't stretch she mustn't stretch we mustn't stretch you mustn't stretch they mustn't stretch	I mustn't be stretching you mustn't be stretching she mustn't be stretching we mustn't be stretching you mustn't be stretching they mustn't be stretching
Perfect	V-ing perfect
I mustn't have stretched you mustn't have stretched she mustn't have stretched we mustn't have stretched you mustn't have stretched they mustn't have stretched	I mustn't have been stretching you mustn't have been stretching she mustn't have been stretching we mustn't have been stretching you mustn't have been stretching they mustn't 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
mustn't I stretch? mustn't you stretch? mustn't she stretch? mustn't we stretch? mustn't you stretch? mustn't they stretch?	mustn't I be stretching? mustn't you be stretching? mustn't she be stretching? mustn't we be stretching? mustn't you be stretching? mustn't they be stretching?
Perfect	V-ing perfect
mustn't I have stretched? mustn't you have stretched? mustn't she have stretched? mustn't we have stretched? mustn't you have stretched? mustn't they have stretched?	mustn't I have been stretching? mustn't you have been stretching? mustn't she have been stretching? mustn't we have been stretching? mustn't you have been stretching? mustn't they have been stretching?