English verb conjugation
CAN REQUEST

Regular verb: request - requested - requested

Affirmation

Simple form	V-ing form
I can request you can request he can request we can request you can request they can request	I can be requesting you can be requesting he can be requesting we can be requesting you can be requesting they can be requesting
Perfect	V-ing perfect
I can have requested you can have requested he can have requested we can have requested you can have requested they can have requested	I can have been requesting you can have been requesting he can have been requesting we can have been requesting you can have been requesting they can have been requesting

Negation

Simple form	V-ing form
I can't request you can't request he can't request we can't request you can't request they can't request	I can't be requesting you can't be requesting he can't be requesting we can't be requesting you can't be requesting they can't be requesting
Perfect	V-ing perfect
I can't have requested you can't have requested he can't have requested we can't have requested you can't have requested they can't have requested	I can't have been requesting you can't have been requesting he can't have been requesting we can't have been requesting you can't have been requesting they can't have been requesting

Interrogative form

Simple form	V-ing form
can I request? can you request? can he request? can we request? can you request? can they request?	can I be requesting? can you be requesting? can he be requesting? can we be requesting? can you be requesting? can they be requesting?
Perfect	V-ing perfect
can I have requested? can you have requested? can he have requested? can we have requested? can you have requested? can they have requested?	can I have been requesting? can you have been requesting? can he have been requesting? can we have been requesting? can you have been requesting? can they have been requesting?

Interro-negative form

Simple form	V-ing form
can't I request? can't you request? can't he request? can't we request? can't you request? can't they request?	can't I be requesting? can't you be requesting? can't he be requesting? can't we be requesting? can't you be requesting? can't they be requesting?
Perfect	V-ing perfect
can't I have requested? can't you have requested? can't he have requested? can't we have requested? can't you have requested? can't they have requested?	can't I have been requesting? can't you have been requesting? can't he have been requesting? can't we have been requesting? can't you have been requesting? can't they have been requesting?