I can gloss you can gloss he can gloss we can gloss you can gloss they can gloss
V-ing form
I can be glossing you can be glossing he can be glossing we can be glossing you can be glossing they can be glossing
Perfect
I can have glossed you can have glossed he can have glossed we can have glossed you can have glossed they can have glossed
V-ing perfect
I can have been glossing you can have been glossing he can have been glossing we can have been glossing you can have been glossing they can have been glossing
Negation
Simple form
I cannot gloss you cannot gloss he cannot gloss we cannot gloss you cannot gloss they cannot gloss
V-ing form
I cannot be glossing you cannot be glossing he cannot be glossing we cannot be glossing you cannot be glossing they cannot be glossing
Perfect
I cannot have glossed you cannot have glossed he cannot have glossed we cannot have glossed you cannot have glossed they cannot have glossed
V-ing perfect
I cannot have been glossing you cannot have been glossing he cannot have been glossing we cannot have been glossing you cannot have been glossing they cannot have been glossing
Interrogative form
Simple form
can I gloss? can you gloss? can he gloss? can we gloss? can you gloss? can they gloss?
V-ing form
can I be glossing? can you be glossing? can he be glossing? can we be glossing? can you be glossing? can they be glossing?
Perfect
can I have glossed? can you have glossed? can he have glossed? can we have glossed? can you have glossed? can they have glossed?
V-ing perfect
can I have been glossing? can you have been glossing? can he have been glossing? can we have been glossing? can you have been glossing? can they have been glossing?
Interro-negative form
Simple form
can I not gloss? can you not gloss? can he not gloss? can we not gloss? can you not gloss? can they not gloss?
V-ing form
can I not be glossing? can you not be glossing? can he not be glossing? can we not be glossing? can you not be glossing? can they not be glossing?
Perfect
can I not have glossed? can you not have glossed? can he not have glossed? can we not have glossed? can you not have glossed? can they not have glossed?
V-ing perfect
can I not have been glossing? can you not have been glossing? can he not have been glossing? can we not have been glossing? can you not have been glossing? can they not have been glossing?