must chop
Regular verb: chop - chopped- chopped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must chop
you must chop
she must chop
we must chop
you must chop
they must chop 	I must be chopping
you must be chopping
she must be chopping
we must be chopping
you must be chopping
they must be chopping	I must have chopped
you must have chopped
she 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
she 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 mustn't chop
you mustn't chop
she mustn't chop
we mustn't chop
you mustn't chop
they mustn't chop 	I mustn't be chopping
you mustn't be chopping
she mustn't be chopping
we mustn't be chopping
you mustn't be chopping
they mustn't be chopping	I mustn't have chopped
you mustn't have chopped
she mustn't have chopped
we mustn't have chopped
you mustn't have chopped
they mustn't have chopped	I mustn't have been chopping
you mustn't have been chopping
she mustn't have been chopping
we mustn't have been chopping
you mustn't have been chopping
they mustn't have been chopping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I chop?
must you chop?
must she chop?
must we chop?
must you chop?
must they chop? 	must I be chopping?
must you be chopping?
must she be chopping?
must we be chopping?
must you be chopping?
must they be chopping? 	must I have chopped?
must you have chopped?
must she 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 she 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 	
mustn't I chop?
mustn't you chop?
mustn't she chop?
mustn't we chop?
mustn't you chop?
mustn't they chop? 	mustn't I be chopping?
mustn't you be chopping?
mustn't she be chopping?
mustn't we be chopping?
mustn't you be chopping?
mustn't they be chopping? 	mustn't I have chopped?
mustn't you have chopped?
mustn't she have chopped?
mustn't we have chopped?
mustn't you have chopped?
mustn't they have chopped? 	mustn't I have been chopping?
mustn't you have been chopping?
mustn't she have been chopping?
mustn't we have been chopping?
mustn't you have been chopping?
mustn't they have been chopping?