English verb conjugation
COULD ORBIT

Regular verb: orbit - orbited - orbited

Affirmation

Simple form	V-ing form
I could orbit you could orbit he could orbit we could orbit you could orbit they could orbit	I could be orbiting you could be orbiting he could be orbiting we could be orbiting you could be orbiting they could be orbiting
Perfect	V-ing perfect
I could have orbited you could have orbited he could have orbited we could have orbited you could have orbited they could have orbited	I could have been orbiting you could have been orbiting he could have been orbiting we could have been orbiting you could have been orbiting they could have been orbiting

Negation

Simple form	V-ing form
I couldn't orbit you couldn't orbit he couldn't orbit we couldn't orbit you couldn't orbit they couldn't orbit	I couldn't be orbiting you couldn't be orbiting he couldn't be orbiting we couldn't be orbiting you couldn't be orbiting they couldn't be orbiting
Perfect	V-ing perfect
I couldn't have orbited you couldn't have orbited he couldn't have orbited we couldn't have orbited you couldn't have orbited they couldn't have orbited	I couldn't have been orbiting you couldn't have been orbiting he couldn't have been orbiting we couldn't have been orbiting you couldn't have been orbiting they couldn't have been orbiting

Interrogative form

Simple form	V-ing form
could I orbit? could you orbit? could he orbit? could we orbit? could you orbit? could they orbit?	could I be orbiting? could you be orbiting? could he be orbiting? could we be orbiting? could you be orbiting? could they be orbiting?
Perfect	V-ing perfect
could I have orbited? could you have orbited? could he have orbited? could we have orbited? could you have orbited? could they have orbited?	could I have been orbiting? could you have been orbiting? could he have been orbiting? could we have been orbiting? could you have been orbiting? could they have been orbiting?

Interro-negative form

Simple form	V-ing form
couldn't I orbit? couldn't you orbit? couldn't he orbit? couldn't we orbit? couldn't you orbit? couldn't they orbit?	couldn't I be orbiting? couldn't you be orbiting? couldn't he be orbiting? couldn't we be orbiting? couldn't you be orbiting? couldn't they be orbiting?
Perfect	V-ing perfect
couldn't I have orbited? couldn't you have orbited? couldn't he have orbited? couldn't we have orbited? couldn't you have orbited? couldn't they have orbited?	couldn't I have been orbiting? couldn't you have been orbiting? couldn't he have been orbiting? couldn't we have been orbiting? couldn't you have been orbiting? couldn't they have been orbiting?