could reserve
Regular verb: reserve - reserved- reserved

Affirmation 	
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I could reserve
you could reserve
she could reserve
we could reserve
you could reserve
they could reserve 	I could be reserving
you could be reserving
she could be reserving
we could be reserving
you could be reserving
they could be reserving	I could have reserved
you could have reserved
she could have reserved
we could have reserved
you could have reserved
they could have reserved	I could have been reserving
you could have been reserving
she could have been reserving
we could have been reserving
you could have been reserving
they could have been reserving	

Negation 	
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I couldn't reserve
you couldn't reserve
she couldn't reserve
we couldn't reserve
you couldn't reserve
they couldn't reserve 	I couldn't be reserving
you couldn't be reserving
she couldn't be reserving
we couldn't be reserving
you couldn't be reserving
they couldn't be reserving	I couldn't have reserved
you couldn't have reserved
she couldn't have reserved
we couldn't have reserved
you couldn't have reserved
they couldn't have reserved	I couldn't have been reserving
you couldn't have been reserving
she couldn't have been reserving
we couldn't have been reserving
you couldn't have been reserving
they couldn't have been reserving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I reserve?
could you reserve?
could she reserve?
could we reserve?
could you reserve?
could they reserve? 	could I be reserving?
could you be reserving?
could she be reserving?
could we be reserving?
could you be reserving?
could they be reserving? 	could I have reserved?
could you have reserved?
could she have reserved?
could we have reserved?
could you have reserved?
could they have reserved? 	could I have been reserving?
could you have been reserving?
could she have been reserving?
could we have been reserving?
could you have been reserving?
could they have been reserving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I reserve?
couldn't you reserve?
couldn't she reserve?
couldn't we reserve?
couldn't you reserve?
couldn't they reserve? 	couldn't I be reserving?
couldn't you be reserving?
couldn't she be reserving?
couldn't we be reserving?
couldn't you be reserving?
couldn't they be reserving? 	couldn't I have reserved?
couldn't you have reserved?
couldn't she have reserved?
couldn't we have reserved?
couldn't you have reserved?
couldn't they have reserved? 	couldn't I have been reserving?
couldn't you have been reserving?
couldn't she have been reserving?
couldn't we have been reserving?
couldn't you have been reserving?
couldn't they have been reserving?