I can trash you can trash he can trash we can trash you can trash they can trash
V-ing form
I can be trashing you can be trashing he can be trashing we can be trashing you can be trashing they can be trashing
Perfect
I can have trashed you can have trashed he can have trashed we can have trashed you can have trashed they can have trashed
V-ing perfect
I can have been trashing you can have been trashing he can have been trashing we can have been trashing you can have been trashing they can have been trashing
Negation
Simple form
I cannot trash you cannot trash he cannot trash we cannot trash you cannot trash they cannot trash
V-ing form
I cannot be trashing you cannot be trashing he cannot be trashing we cannot be trashing you cannot be trashing they cannot be trashing
Perfect
I cannot have trashed you cannot have trashed he cannot have trashed we cannot have trashed you cannot have trashed they cannot have trashed
V-ing perfect
I cannot have been trashing you cannot have been trashing he cannot have been trashing we cannot have been trashing you cannot have been trashing they cannot have been trashing
Interrogative form
Simple form
can I trash? can you trash? can he trash? can we trash? can you trash? can they trash?
V-ing form
can I be trashing? can you be trashing? can he be trashing? can we be trashing? can you be trashing? can they be trashing?
Perfect
can I have trashed? can you have trashed? can he have trashed? can we have trashed? can you have trashed? can they have trashed?
V-ing perfect
can I have been trashing? can you have been trashing? can he have been trashing? can we have been trashing? can you have been trashing? can they have been trashing?
Interro-negative form
Simple form
can I not trash? can you not trash? can he not trash? can we not trash? can you not trash? can they not trash?
V-ing form
can I not be trashing? can you not be trashing? can he not be trashing? can we not be trashing? can you not be trashing? can they not be trashing?
Perfect
can I not have trashed? can you not have trashed? can he not have trashed? can we not have trashed? can you not have trashed? can they not have trashed?
V-ing perfect
can I not have been trashing? can you not have been trashing? can he not have been trashing? can we not have been trashing? can you not have been trashing? can they not have been trashing?