English verb conjugation
COULD SHIP

Regular verb: ship - shipped - shipped

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?