could invite
Regular verb: invite - invited- invited

Affirmation 	
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I could invite
you could invite
she could invite
we could invite
you could invite
they could invite 	I could be inviting
you could be inviting
she could be inviting
we could be inviting
you could be inviting
they could be inviting	I could have invited
you could have invited
she could have invited
we could have invited
you could have invited
they could have invited	I could have been inviting
you could have been inviting
she could have been inviting
we could have been inviting
you could have been inviting
they could have been inviting	

Negation 	
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I couldn't invite
you couldn't invite
she couldn't invite
we couldn't invite
you couldn't invite
they couldn't invite 	I couldn't be inviting
you couldn't be inviting
she couldn't be inviting
we couldn't be inviting
you couldn't be inviting
they couldn't be inviting	I couldn't have invited
you couldn't have invited
she couldn't have invited
we couldn't have invited
you couldn't have invited
they couldn't have invited	I couldn't have been inviting
you couldn't have been inviting
she couldn't have been inviting
we couldn't have been inviting
you couldn't have been inviting
they couldn't have been inviting	

Interrogative form 	
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could I invite?
could you invite?
could she invite?
could we invite?
could you invite?
could they invite? 	could I be inviting?
could you be inviting?
could she be inviting?
could we be inviting?
could you be inviting?
could they be inviting? 	could I have invited?
could you have invited?
could she have invited?
could we have invited?
could you have invited?
could they have invited? 	could I have been inviting?
could you have been inviting?
could she have been inviting?
could we have been inviting?
could you have been inviting?
could they have been inviting? 	

Interro-negative form 	
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couldn't I invite?
couldn't you invite?
couldn't she invite?
couldn't we invite?
couldn't you invite?
couldn't they invite? 	couldn't I be inviting?
couldn't you be inviting?
couldn't she be inviting?
couldn't we be inviting?
couldn't you be inviting?
couldn't they be inviting? 	couldn't I have invited?
couldn't you have invited?
couldn't she have invited?
couldn't we have invited?
couldn't you have invited?
couldn't they have invited? 	couldn't I have been inviting?
couldn't you have been inviting?
couldn't she have been inviting?
couldn't we have been inviting?
couldn't you have been inviting?
couldn't they have been inviting?