English verb conjugation
COULD SWOP

Regular verb: swop - swopped - swopped

Affirmation

Simple form	V-ing form
I could swop you could swop he could swop we could swop you could swop they could swop	I could be swopping you could be swopping he could be swopping we could be swopping you could be swopping they could be swopping
Perfect	V-ing perfect
I could have swopped you could have swopped he could have swopped we could have swopped you could have swopped they could have swopped	I could have been swopping you could have been swopping he could have been swopping we could have been swopping you could have been swopping they could have been swopping

Negation

Simple form	V-ing form
I couldn't swop you couldn't swop he couldn't swop we couldn't swop you couldn't swop they couldn't swop	I couldn't be swopping you couldn't be swopping he couldn't be swopping we couldn't be swopping you couldn't be swopping they couldn't be swopping
Perfect	V-ing perfect
I couldn't have swopped you couldn't have swopped he couldn't have swopped we couldn't have swopped you couldn't have swopped they couldn't have swopped	I couldn't have been swopping you couldn't have been swopping he couldn't have been swopping we couldn't have been swopping you couldn't have been swopping they couldn't have been swopping

Interrogative form

Simple form	V-ing form
could I swop? could you swop? could he swop? could we swop? could you swop? could they swop?	could I be swopping? could you be swopping? could he be swopping? could we be swopping? could you be swopping? could they be swopping?
Perfect	V-ing perfect
could I have swopped? could you have swopped? could he have swopped? could we have swopped? could you have swopped? could they have swopped?	could I have been swopping? could you have been swopping? could he have been swopping? could we have been swopping? could you have been swopping? could they have been swopping?

Interro-negative form

Simple form	V-ing form
couldn't I swop? couldn't you swop? couldn't he swop? couldn't we swop? couldn't you swop? couldn't they swop?	couldn't I be swopping? couldn't you be swopping? couldn't he be swopping? couldn't we be swopping? couldn't you be swopping? couldn't they be swopping?
Perfect	V-ing perfect
couldn't I have swopped? couldn't you have swopped? couldn't he have swopped? couldn't we have swopped? couldn't you have swopped? couldn't they have swopped?	couldn't I have been swopping? couldn't you have been swopping? couldn't he have been swopping? couldn't we have been swopping? couldn't you have been swopping? couldn't they have been swopping?