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 can't expire you can't expire he can't expire we can't expire you can't expire they can't expire	I can't be expiring you can't be expiring he can't be expiring we can't be expiring you can't be expiring they can't be expiring
Perfect	V-ing perfect
I can't have expired you can't have expired he can't have expired we can't have expired you can't have expired they can't have expired	I can't have been expiring you can't have been expiring he can't have been expiring we can't have been expiring you can't have been expiring they can't 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't I expire? can't you expire? can't he expire? can't we expire? can't you expire? can't they expire?	can't I be expiring? can't you be expiring? can't he be expiring? can't we be expiring? can't you be expiring? can't they be expiring?
Perfect	V-ing perfect
can't I have expired? can't you have expired? can't he have expired? can't we have expired? can't you have expired? can't they have expired?	can't I have been expiring? can't you have been expiring? can't he have been expiring? can't we have been expiring? can't you have been expiring? can't they have been expiring?