English verb conjugation
CAN CRUSH

Regular verb: crush - crushed - crushed

Affirmation

Simple form	V-ing form
I can crush you can crush he can crush we can crush you can crush they can crush	I can be crushing you can be crushing he can be crushing we can be crushing you can be crushing they can be crushing
Perfect	V-ing perfect
I can have crushed you can have crushed he can have crushed we can have crushed you can have crushed they can have crushed	I can have been crushing you can have been crushing he can have been crushing we can have been crushing you can have been crushing they can have been crushing

Negation

Simple form	V-ing form
I cannot crush you cannot crush he cannot crush we cannot crush you cannot crush they cannot crush	I cannot be crushing you cannot be crushing he cannot be crushing we cannot be crushing you cannot be crushing they cannot be crushing
Perfect	V-ing perfect
I cannot have crushed you cannot have crushed he cannot have crushed we cannot have crushed you cannot have crushed they cannot have crushed	I cannot have been crushing you cannot have been crushing he cannot have been crushing we cannot have been crushing you cannot have been crushing they cannot have been crushing

Interrogative form

Simple form	V-ing form
can I crush? can you crush? can he crush? can we crush? can you crush? can they crush?	can I be crushing? can you be crushing? can he be crushing? can we be crushing? can you be crushing? can they be crushing?
Perfect	V-ing perfect
can I have crushed? can you have crushed? can he have crushed? can we have crushed? can you have crushed? can they have crushed?	can I have been crushing? can you have been crushing? can he have been crushing? can we have been crushing? can you have been crushing? can they have been crushing?

Interro-negative form

Simple form	V-ing form
can I not crush? can you not crush? can he not crush? can we not crush? can you not crush? can they not crush?	can I not be crushing? can you not be crushing? can he not be crushing? can we not be crushing? can you not be crushing? can they not be crushing?
Perfect	V-ing perfect
can I not have crushed? can you not have crushed? can he not have crushed? can we not have crushed? can you not have crushed? can they not have crushed?	can I not have been crushing? can you not have been crushing? can he not have been crushing? can we not have been crushing? can you not have been crushing? can they not have been crushing?