could hamper
Regular verb: hamper - hampered- hampered

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

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

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

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