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 can't gloss you can't gloss he can't gloss we can't gloss you can't gloss they can't gloss
V-ing form
I can't be glossing you can't be glossing he can't be glossing we can't be glossing you can't be glossing they can't be glossing
Perfect
I can't have glossed you can't have glossed he can't have glossed we can't have glossed you can't have glossed they can't have glossed
V-ing perfect
I can't have been glossing you can't have been glossing he can't have been glossing we can't have been glossing you can't have been glossing they can't 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't I gloss? can't you gloss? can't he gloss? can't we gloss? can't you gloss? can't they gloss?
V-ing form
can't I be glossing? can't you be glossing? can't he be glossing? can't we be glossing? can't you be glossing? can't they be glossing?
Perfect
can't I have glossed? can't you have glossed? can't he have glossed? can't we have glossed? can't you have glossed? can't they have glossed?
V-ing perfect
can't I have been glossing? can't you have been glossing? can't he have been glossing? can't we have been glossing? can't you have been glossing? can't they have been glossing?