I can freshen you can freshen he can freshen we can freshen you can freshen they can freshen
V-ing form
I can be freshening you can be freshening he can be freshening we can be freshening you can be freshening they can be freshening
Perfect
I can have freshened you can have freshened he can have freshened we can have freshened you can have freshened they can have freshened
V-ing perfect
I can have been freshening you can have been freshening he can have been freshening we can have been freshening you can have been freshening they can have been freshening
Negation
Simple form
I can't freshen you can't freshen he can't freshen we can't freshen you can't freshen they can't freshen
V-ing form
I can't be freshening you can't be freshening he can't be freshening we can't be freshening you can't be freshening they can't be freshening
Perfect
I can't have freshened you can't have freshened he can't have freshened we can't have freshened you can't have freshened they can't have freshened
V-ing perfect
I can't have been freshening you can't have been freshening he can't have been freshening we can't have been freshening you can't have been freshening they can't have been freshening
Interrogative form
Simple form
can I freshen? can you freshen? can he freshen? can we freshen? can you freshen? can they freshen?
V-ing form
can I be freshening? can you be freshening? can he be freshening? can we be freshening? can you be freshening? can they be freshening?
Perfect
can I have freshened? can you have freshened? can he have freshened? can we have freshened? can you have freshened? can they have freshened?
V-ing perfect
can I have been freshening? can you have been freshening? can he have been freshening? can we have been freshening? can you have been freshening? can they have been freshening?
Interro-negative form
Simple form
can't I freshen? can't you freshen? can't he freshen? can't we freshen? can't you freshen? can't they freshen?
V-ing form
can't I be freshening? can't you be freshening? can't he be freshening? can't we be freshening? can't you be freshening? can't they be freshening?
Perfect
can't I have freshened? can't you have freshened? can't he have freshened? can't we have freshened? can't you have freshened? can't they have freshened?
V-ing perfect
can't I have been freshening? can't you have been freshening? can't he have been freshening? can't we have been freshening? can't you have been freshening? can't they have been freshening?