English verb conjugation
CAN EXPIRE

Regular verb: expire - expired - expired

Affirmation

Simple form	V-ing form
I can expire you can expire he can expire we can expire you can expire they can expire	I can be expiring you can be expiring he can be expiring we can be expiring you can be expiring they can be expiring
Perfect	V-ing perfect
I can have expired you can have expired he can have expired we can have expired you can have expired they can have expired	I can have been expiring you can have been expiring he can have been expiring we can have been expiring you can have been expiring they can have been expiring

Negation

Simple form	V-ing form
I cannot expire you cannot expire he cannot expire we cannot expire you cannot expire they cannot expire	I cannot be expiring you cannot be expiring he cannot be expiring we cannot be expiring you cannot be expiring they cannot be expiring
Perfect	V-ing perfect
I cannot have expired you cannot have expired he cannot have expired we cannot have expired you cannot have expired they cannot have expired	I cannot have been expiring you cannot have been expiring he cannot have been expiring we cannot have been expiring you cannot have been expiring they cannot have been expiring

Interrogative form

Simple form	V-ing form
can I expire? can you expire? can he expire? can we expire? can you expire? can they expire?	can I be expiring? can you be expiring? can he be expiring? can we be expiring? can you be expiring? can they be expiring?
Perfect	V-ing perfect
can I have expired? can you have expired? can he have expired? can we have expired? can you have expired? can they have expired?	can I have been expiring? can you have been expiring? can he have been expiring? can we have been expiring? can you have been expiring? can they have been expiring?

Interro-negative form

Simple form	V-ing form
can I not expire? can you not expire? can he not expire? can we not expire? can you not expire? can they not expire?	can I not be expiring? can you not be expiring? can he not be expiring? can we not be expiring? can you not be expiring? can they not be expiring?
Perfect	V-ing perfect
can I not have expired? can you not have expired? can he not have expired? can we not have expired? can you not have expired? can they not have expired?	can I not have been expiring? can you not have been expiring? can he not have been expiring? can we not have been expiring? can you not have been expiring? can they not have been expiring?