must swop
Regular verb: swop - swopped- swopped

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

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

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

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