must hamper
Regular verb: hamper - hampered- hampered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must hamper
you must hamper
she must hamper
we must hamper
you must hamper
they must hamper 	I must be hampering
you must be hampering
she must be hampering
we must be hampering
you must be hampering
they must be hampering	I must have hampered
you must have hampered
she must have hampered
we must have hampered
you must have hampered
they must have hampered	I must have been hampering
you must have been hampering
she must have been hampering
we must have been hampering
you must have been hampering
they must have been hampering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't hamper
you mustn't hamper
she mustn't hamper
we mustn't hamper
you mustn't hamper
they mustn't hamper 	I mustn't be hampering
you mustn't be hampering
she mustn't be hampering
we mustn't be hampering
you mustn't be hampering
they mustn't be hampering	I mustn't have hampered
you mustn't have hampered
she mustn't have hampered
we mustn't have hampered
you mustn't have hampered
they mustn't have hampered	I mustn't have been hampering
you mustn't have been hampering
she mustn't have been hampering
we mustn't have been hampering
you mustn't have been hampering
they mustn't have been hampering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I hamper?
must you hamper?
must she hamper?
must we hamper?
must you hamper?
must they hamper? 	must I be hampering?
must you be hampering?
must she be hampering?
must we be hampering?
must you be hampering?
must they be hampering? 	must I have hampered?
must you have hampered?
must she have hampered?
must we have hampered?
must you have hampered?
must they have hampered? 	must I have been hampering?
must you have been hampering?
must she have been hampering?
must we have been hampering?
must you have been hampering?
must they have been hampering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I hamper?
mustn't you hamper?
mustn't she hamper?
mustn't we hamper?
mustn't you hamper?
mustn't they hamper? 	mustn't I be hampering?
mustn't you be hampering?
mustn't she be hampering?
mustn't we be hampering?
mustn't you be hampering?
mustn't they be hampering? 	mustn't I have hampered?
mustn't you have hampered?
mustn't she have hampered?
mustn't we have hampered?
mustn't you have hampered?
mustn't they have hampered? 	mustn't I have been hampering?
mustn't you have been hampering?
mustn't she have been hampering?
mustn't we have been hampering?
mustn't you have been hampering?
mustn't they have been hampering?