English verb conjugation
CAN DROWSE

Regular verb: drowse - drowsed - drowsed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

Simple form	V-ing form
can I not drowse? can you not drowse? can he not drowse? can we not drowse? can you not drowse? can they not drowse?	can I not be drowsing? can you not be drowsing? can he not be drowsing? can we not be drowsing? can you not be drowsing? can they not be drowsing?
Perfect	V-ing perfect
can I not have drowsed? can you not have drowsed? can he not have drowsed? can we not have drowsed? can you not have drowsed? can they not have drowsed?	can I not have been drowsing? can you not have been drowsing? can he not have been drowsing? can we not have been drowsing? can you not have been drowsing? can they not have been drowsing?