could preinvite
Regular verb: preinvite - preinvited- preinvited

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could preinvite
you could preinvite
she could preinvite
we could preinvite
you could preinvite
they could preinvite 	I could be preinviting
you could be preinviting
she could be preinviting
we could be preinviting
you could be preinviting
they could be preinviting	I could have preinvited
you could have preinvited
she could have preinvited
we could have preinvited
you could have preinvited
they could have preinvited	I could have been preinviting
you could have been preinviting
she could have been preinviting
we could have been preinviting
you could have been preinviting
they could have been preinviting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't preinvite
you couldn't preinvite
she couldn't preinvite
we couldn't preinvite
you couldn't preinvite
they couldn't preinvite 	I couldn't be preinviting
you couldn't be preinviting
she couldn't be preinviting
we couldn't be preinviting
you couldn't be preinviting
they couldn't be preinviting	I couldn't have preinvited
you couldn't have preinvited
she couldn't have preinvited
we couldn't have preinvited
you couldn't have preinvited
they couldn't have preinvited	I couldn't have been preinviting
you couldn't have been preinviting
she couldn't have been preinviting
we couldn't have been preinviting
you couldn't have been preinviting
they couldn't have been preinviting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I preinvite?
could you preinvite?
could she preinvite?
could we preinvite?
could you preinvite?
could they preinvite? 	could I be preinviting?
could you be preinviting?
could she be preinviting?
could we be preinviting?
could you be preinviting?
could they be preinviting? 	could I have preinvited?
could you have preinvited?
could she have preinvited?
could we have preinvited?
could you have preinvited?
could they have preinvited? 	could I have been preinviting?
could you have been preinviting?
could she have been preinviting?
could we have been preinviting?
could you have been preinviting?
could they have been preinviting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I preinvite?
couldn't you preinvite?
couldn't she preinvite?
couldn't we preinvite?
couldn't you preinvite?
couldn't they preinvite? 	couldn't I be preinviting?
couldn't you be preinviting?
couldn't she be preinviting?
couldn't we be preinviting?
couldn't you be preinviting?
couldn't they be preinviting? 	couldn't I have preinvited?
couldn't you have preinvited?
couldn't she have preinvited?
couldn't we have preinvited?
couldn't you have preinvited?
couldn't they have preinvited? 	couldn't I have been preinviting?
couldn't you have been preinviting?
couldn't she have been preinviting?
couldn't we have been preinviting?
couldn't you have been preinviting?
couldn't they have been preinviting?