English verb conjugation
CAN RETIRE

Regular verb: retire - retired - retired

Affirmation

Simple form	V-ing form
I can retire you can retire she can retire we can retire you can retire they can retire	I can be retiring you can be retiring she can be retiring we can be retiring you can be retiring they can be retiring
Perfect	V-ing perfect
I can have retired you can have retired she can have retired we can have retired you can have retired they can have retired	I can have been retiring you can have been retiring she can have been retiring we can have been retiring you can have been retiring they can have been retiring

Negation

Simple form	V-ing form
I can't retire you can't retire she can't retire we can't retire you can't retire they can't retire	I can't be retiring you can't be retiring she can't be retiring we can't be retiring you can't be retiring they can't be retiring
Perfect	V-ing perfect
I can't have retired you can't have retired she can't have retired we can't have retired you can't have retired they can't have retired	I can't have been retiring you can't have been retiring she can't have been retiring we can't have been retiring you can't have been retiring they can't have been retiring

Interrogative form

Simple form	V-ing form
can I retire? can you retire? can she retire? can we retire? can you retire? can they retire?	can I be retiring? can you be retiring? can she be retiring? can we be retiring? can you be retiring? can they be retiring?
Perfect	V-ing perfect
can I have retired? can you have retired? can she have retired? can we have retired? can you have retired? can they have retired?	can I have been retiring? can you have been retiring? can she have been retiring? can we have been retiring? can you have been retiring? can they have been retiring?

Interro-negative form

Simple form	V-ing form
can't I retire? can't you retire? can't she retire? can't we retire? can't you retire? can't they retire?	can't I be retiring? can't you be retiring? can't she be retiring? can't we be retiring? can't you be retiring? can't they be retiring?
Perfect	V-ing perfect
can't I have retired? can't you have retired? can't she have retired? can't we have retired? can't you have retired? can't they have retired?	can't I have been retiring? can't you have been retiring? can't she have been retiring? can't we have been retiring? can't you have been retiring? can't they have been retiring?