could request
Regular verb: request - requested- requested

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could request
you could request
she could request
we could request
you could request
they could request 	I could be requesting
you could be requesting
she could be requesting
we could be requesting
you could be requesting
they could be requesting	I could have requested
you could have requested
she could have requested
we could have requested
you could have requested
they could have requested	I could have been requesting
you could have been requesting
she could have been requesting
we could have been requesting
you could have been requesting
they could have been requesting	

Negation 	
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I couldn't request
you couldn't request
she couldn't request
we couldn't request
you couldn't request
they couldn't request 	I couldn't be requesting
you couldn't be requesting
she couldn't be requesting
we couldn't be requesting
you couldn't be requesting
they couldn't be requesting	I couldn't have requested
you couldn't have requested
she couldn't have requested
we couldn't have requested
you couldn't have requested
they couldn't have requested	I couldn't have been requesting
you couldn't have been requesting
she couldn't have been requesting
we couldn't have been requesting
you couldn't have been requesting
they couldn't have been requesting	

Interrogative form 	
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could I request?
could you request?
could she request?
could we request?
could you request?
could they request? 	could I be requesting?
could you be requesting?
could she be requesting?
could we be requesting?
could you be requesting?
could they be requesting? 	could I have requested?
could you have requested?
could she have requested?
could we have requested?
could you have requested?
could they have requested? 	could I have been requesting?
could you have been requesting?
could she have been requesting?
could we have been requesting?
could you have been requesting?
could they have been requesting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I request?
couldn't you request?
couldn't she request?
couldn't we request?
couldn't you request?
couldn't they request? 	couldn't I be requesting?
couldn't you be requesting?
couldn't she be requesting?
couldn't we be requesting?
couldn't you be requesting?
couldn't they be requesting? 	couldn't I have requested?
couldn't you have requested?
couldn't she have requested?
couldn't we have requested?
couldn't you have requested?
couldn't they have requested? 	couldn't I have been requesting?
couldn't you have been requesting?
couldn't she have been requesting?
couldn't we have been requesting?
couldn't you have been requesting?
couldn't they have been requesting?