English verb conjugation
MUST DROWSE

Regular verb: drowse - drowsed - drowsed

Affirmation

Simple form	V-ing form
I must drowse you must drowse he must drowse we must drowse you must drowse they must drowse	I must be drowsing you must be drowsing he must be drowsing we must be drowsing you must be drowsing they must be drowsing
Perfect	V-ing perfect
I must have drowsed you must have drowsed he must have drowsed we must have drowsed you must have drowsed they must have drowsed	I must have been drowsing you must have been drowsing he must have been drowsing we must have been drowsing you must have been drowsing they must have been drowsing

Negation

Simple form	V-ing form
I mustn't drowse you mustn't drowse he mustn't drowse we mustn't drowse you mustn't drowse they mustn't drowse	I mustn't be drowsing you mustn't be drowsing he mustn't be drowsing we mustn't be drowsing you mustn't be drowsing they mustn't be drowsing
Perfect	V-ing perfect
I mustn't have drowsed you mustn't have drowsed he mustn't have drowsed we mustn't have drowsed you mustn't have drowsed they mustn't have drowsed	I mustn't have been drowsing you mustn't have been drowsing he mustn't have been drowsing we mustn't have been drowsing you mustn't have been drowsing they mustn't have been drowsing

Interrogative form

Simple form	V-ing form
must I drowse? must you drowse? must he drowse? must we drowse? must you drowse? must they drowse?	must I be drowsing? must you be drowsing? must he be drowsing? must we be drowsing? must you be drowsing? must they be drowsing?
Perfect	V-ing perfect
must I have drowsed? must you have drowsed? must he have drowsed? must we have drowsed? must you have drowsed? must they have drowsed?	must I have been drowsing? must you have been drowsing? must he have been drowsing? must we have been drowsing? must you have been drowsing? must they have been drowsing?

Interro-negative form

Simple form	V-ing form
mustn't I drowse? mustn't you drowse? mustn't he drowse? mustn't we drowse? mustn't you drowse? mustn't they drowse?	mustn't I be drowsing? mustn't you be drowsing? mustn't he be drowsing? mustn't we be drowsing? mustn't you be drowsing? mustn't they be drowsing?
Perfect	V-ing perfect
mustn't I have drowsed? mustn't you have drowsed? mustn't he have drowsed? mustn't we have drowsed? mustn't you have drowsed? mustn't they have drowsed?	mustn't I have been drowsing? mustn't you have been drowsing? mustn't he have been drowsing? mustn't we have been drowsing? mustn't you have been drowsing? mustn't they have been drowsing?