could ship
Regular verb: ship - shipped- shipped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could ship
you could ship
he could ship
we could ship
you could ship
they could ship 	I could be shipping
you could be shipping
he could be shipping
we could be shipping
you could be shipping
they could be shipping	I could have shipped
you could have shipped
he 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
he 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
he 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
he 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
he 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
he 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 he ship?
could we ship?
could you ship?
could they ship? 	could I be shipping?
could you be shipping?
could he be shipping?
could we be shipping?
could you be shipping?
could they be shipping? 	could I have shipped?
could you have shipped?
could he 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 he 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 he 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 he 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 he 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 he have been shipping?
couldn't we have been shipping?
couldn't you have been shipping?
couldn't they have been shipping?