must chop
Regular verb: chop - chopped- chopped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must chop
you must chop
he must chop
we must chop
you must chop
they must chop 	I must be chopping
you must be chopping
he must be chopping
we must be chopping
you must be chopping
they must be chopping	I must have chopped
you must have chopped
he must have chopped
we must have chopped
you must have chopped
they must have chopped	I must have been chopping
you must have been chopping
he must have been chopping
we must have been chopping
you must have been chopping
they must have been chopping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not chop
you must not chop
he must not chop
we must not chop
you must not chop
they must not chop 	I must not be chopping
you must not be chopping
he must not be chopping
we must not be chopping
you must not be chopping
they must not be chopping	I must not have chopped
you must not have chopped
he must not have chopped
we must not have chopped
you must not have chopped
they must not have chopped	I must not have been chopping
you must not have been chopping
he must not have been chopping
we must not have been chopping
you must not have been chopping
they must not have been chopping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I chop?
must you chop?
must he chop?
must we chop?
must you chop?
must they chop? 	must I be chopping?
must you be chopping?
must he be chopping?
must we be chopping?
must you be chopping?
must they be chopping? 	must I have chopped?
must you have chopped?
must he have chopped?
must we have chopped?
must you have chopped?
must they have chopped? 	must I have been chopping?
must you have been chopping?
must he have been chopping?
must we have been chopping?
must you have been chopping?
must they have been chopping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not chop?
must you not chop?
must he not chop?
must we not chop?
must you not chop?
must they not chop? 	must I not be chopping?
must you not be chopping?
must he not be chopping?
must we not be chopping?
must you not be chopping?
must they not be chopping? 	must I not have chopped?
must you not have chopped?
must he not have chopped?
must we not have chopped?
must you not have chopped?
must they not have chopped? 	must I not have been chopping?
must you not have been chopping?
must he not have been chopping?
must we not have been chopping?
must you not have been chopping?
must they not have been chopping?