could phone
Regular verb: phone - phoned- phoned

Affirmation 	
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I could phone
you could phone
she could phone
we could phone
you could phone
they could phone 	I could be phoning
you could be phoning
she could be phoning
we could be phoning
you could be phoning
they could be phoning	I could have phoned
you could have phoned
she could have phoned
we could have phoned
you could have phoned
they could have phoned	I could have been phoning
you could have been phoning
she could have been phoning
we could have been phoning
you could have been phoning
they could have been phoning	

Negation 	
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I couldn't phone
you couldn't phone
she couldn't phone
we couldn't phone
you couldn't phone
they couldn't phone 	I couldn't be phoning
you couldn't be phoning
she couldn't be phoning
we couldn't be phoning
you couldn't be phoning
they couldn't be phoning	I couldn't have phoned
you couldn't have phoned
she couldn't have phoned
we couldn't have phoned
you couldn't have phoned
they couldn't have phoned	I couldn't have been phoning
you couldn't have been phoning
she couldn't have been phoning
we couldn't have been phoning
you couldn't have been phoning
they couldn't have been phoning	

Interrogative form 	
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could I phone?
could you phone?
could she phone?
could we phone?
could you phone?
could they phone? 	could I be phoning?
could you be phoning?
could she be phoning?
could we be phoning?
could you be phoning?
could they be phoning? 	could I have phoned?
could you have phoned?
could she have phoned?
could we have phoned?
could you have phoned?
could they have phoned? 	could I have been phoning?
could you have been phoning?
could she have been phoning?
could we have been phoning?
could you have been phoning?
could they have been phoning? 	

Interro-negative form 	
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couldn't I phone?
couldn't you phone?
couldn't she phone?
couldn't we phone?
couldn't you phone?
couldn't they phone? 	couldn't I be phoning?
couldn't you be phoning?
couldn't she be phoning?
couldn't we be phoning?
couldn't you be phoning?
couldn't they be phoning? 	couldn't I have phoned?
couldn't you have phoned?
couldn't she have phoned?
couldn't we have phoned?
couldn't you have phoned?
couldn't they have phoned? 	couldn't I have been phoning?
couldn't you have been phoning?
couldn't she have been phoning?
couldn't we have been phoning?
couldn't you have been phoning?
couldn't they have been phoning?