I can trim you can trim she can trim we can trim you can trim they can trim
V-ing form
I can be trimming you can be trimming she can be trimming we can be trimming you can be trimming they can be trimming
Perfect
I can have trimmed you can have trimmed she 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 she 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 she 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 she 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 she 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 she 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 she trim? can we trim? can you trim? can they trim?
V-ing form
can I be trimming? can you be trimming? can she be trimming? can we be trimming? can you be trimming? can they be trimming?
Perfect
can I have trimmed? can you have trimmed? can she 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 she 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 she 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 she 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 she 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 she have been trimming? can't we have been trimming? can't you have been trimming? can't they have been trimming?