could ship
Regular verb: ship - shipped- shipped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could ship
you could ship
she could ship
we could ship
you could ship
they could ship 	I could be shipping
you could be shipping
she could be shipping
we could be shipping
you could be shipping
they could be shipping	I could have shipped
you could have shipped
she could have shipped
we could have shipped
you could have shipped
they could have shipped	I could have been shipping
you could have been shipping
she could have been shipping
we could have been shipping
you could have been shipping
they could have been shipping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't ship
you couldn't ship
she couldn't ship
we couldn't ship
you couldn't ship
they couldn't ship 	I couldn't be shipping
you couldn't be shipping
she couldn't be shipping
we couldn't be shipping
you couldn't be shipping
they couldn't be shipping	I couldn't have shipped
you couldn't have shipped
she couldn't have shipped
we couldn't have shipped
you couldn't have shipped
they couldn't have shipped	I couldn't have been shipping
you couldn't have been shipping
she couldn't have been shipping
we couldn't have been shipping
you couldn't have been shipping
they couldn't have been shipping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I ship?
could you ship?
could she ship?
could we ship?
could you ship?
could they ship? 	could I be shipping?
could you be shipping?
could she be shipping?
could we be shipping?
could you be shipping?
could they be shipping? 	could I have shipped?
could you have shipped?
could she have shipped?
could we have shipped?
could you have shipped?
could they have shipped? 	could I have been shipping?
could you have been shipping?
could she have been shipping?
could we have been shipping?
could you have been shipping?
could they have been shipping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I ship?
couldn't you ship?
couldn't she ship?
couldn't we ship?
couldn't you ship?
couldn't they ship? 	couldn't I be shipping?
couldn't you be shipping?
couldn't she be shipping?
couldn't we be shipping?
couldn't you be shipping?
couldn't they be shipping? 	couldn't I have shipped?
couldn't you have shipped?
couldn't she have shipped?
couldn't we have shipped?
couldn't you have shipped?
couldn't they have shipped? 	couldn't I have been shipping?
couldn't you have been shipping?
couldn't she have been shipping?
couldn't we have been shipping?
couldn't you have been shipping?
couldn't they have been shipping?