can swop
Regular verb: swop - swopped- swopped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can swop
you can swop
she can swop
we can swop
you can swop
they can swop 	I can be swopping
you can be swopping
she can be swopping
we can be swopping
you can be swopping
they can be swopping	I can have swopped
you can have swopped
she can have swopped
we can have swopped
you can have swopped
they can have swopped	I can have been swopping
you can have been swopping
she can have been swopping
we can have been swopping
you can have been swopping
they can have been swopping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot swop
you cannot swop
she cannot swop
we cannot swop
you cannot swop
they cannot swop 	I cannot be swopping
you cannot be swopping
she cannot be swopping
we cannot be swopping
you cannot be swopping
they cannot be swopping	I cannot have swopped
you cannot have swopped
she cannot have swopped
we cannot have swopped
you cannot have swopped
they cannot have swopped	I cannot have been swopping
you cannot have been swopping
she cannot have been swopping
we cannot have been swopping
you cannot have been swopping
they cannot have been swopping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I swop?
can you swop?
can she swop?
can we swop?
can you swop?
can they swop? 	can I be swopping?
can you be swopping?
can she be swopping?
can we be swopping?
can you be swopping?
can they be swopping? 	can I have swopped?
can you have swopped?
can she have swopped?
can we have swopped?
can you have swopped?
can they have swopped? 	can I have been swopping?
can you have been swopping?
can she have been swopping?
can we have been swopping?
can you have been swopping?
can they have been swopping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not swop?
can you not swop?
can she not swop?
can we not swop?
can you not swop?
can they not swop? 	can I not be swopping?
can you not be swopping?
can she not be swopping?
can we not be swopping?
can you not be swopping?
can they not be swopping? 	can I not have swopped?
can you not have swopped?
can she not have swopped?
can we not have swopped?
can you not have swopped?
can they not have swopped? 	can I not have been swopping?
can you not have been swopping?
can she not have been swopping?
can we not have been swopping?
can you not have been swopping?
can they not have been swopping?