English verb conjugation
CAN RETIRE

Regular verb: retire - retired - retired

Affirmation

Simple form	V-ing form
I can retire you can retire he can retire we can retire you can retire they can retire	I can be retiring you can be retiring he 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 he 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 he 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 he 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 he 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 he 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 he 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 he retire? can we retire? can you retire? can they retire?	can I be retiring? can you be retiring? can he 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 he 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 he 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 he 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 he 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 he 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 he have been retiring? can't we have been retiring? can't you have been retiring? can't they have been retiring?