I can trim you can trim he can trim we can trim you can trim they can trim
V-ing form
I can be trimming you can be trimming he can be trimming we can be trimming you can be trimming they can be trimming
Perfect
I can have trimmed you can have trimmed he can have trimmed we can have trimmed you can have trimmed they can have trimmed
V-ing perfect
I can have been trimming you can have been trimming he can have been trimming we can have been trimming you can have been trimming they can have been trimming
Negation
Simple form
I can't trim you can't trim he can't trim we can't trim you can't trim they can't trim
V-ing form
I can't be trimming you can't be trimming he can't be trimming we can't be trimming you can't be trimming they can't be trimming
Perfect
I can't have trimmed you can't have trimmed he can't have trimmed we can't have trimmed you can't have trimmed they can't have trimmed
V-ing perfect
I can't have been trimming you can't have been trimming he can't have been trimming we can't have been trimming you can't have been trimming they can't have been trimming
Interrogative form
Simple form
can I trim? can you trim? can he trim? can we trim? can you trim? can they trim?
V-ing form
can I be trimming? can you be trimming? can he be trimming? can we be trimming? can you be trimming? can they be trimming?
Perfect
can I have trimmed? can you have trimmed? can he have trimmed? can we have trimmed? can you have trimmed? can they have trimmed?
V-ing perfect
can I have been trimming? can you have been trimming? can he have been trimming? can we have been trimming? can you have been trimming? can they have been trimming?
Interro-negative form
Simple form
can't I trim? can't you trim? can't he trim? can't we trim? can't you trim? can't they trim?
V-ing form
can't I be trimming? can't you be trimming? can't he be trimming? can't we be trimming? can't you be trimming? can't they be trimming?
Perfect
can't I have trimmed? can't you have trimmed? can't he have trimmed? can't we have trimmed? can't you have trimmed? can't they have trimmed?
V-ing perfect
can't I have been trimming? can't you have been trimming? can't he have been trimming? can't we have been trimming? can't you have been trimming? can't they have been trimming?