must scamper
Regular verb: scamper - scampered- scampered

Affirmation 	
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I must scamper
you must scamper
she must scamper
we must scamper
you must scamper
they must scamper 	I must be scampering
you must be scampering
she must be scampering
we must be scampering
you must be scampering
they must be scampering	I must have scampered
you must have scampered
she must have scampered
we must have scampered
you must have scampered
they must have scampered	I must have been scampering
you must have been scampering
she must have been scampering
we must have been scampering
you must have been scampering
they must have been scampering	

Negation 	
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I must not scamper
you must not scamper
she must not scamper
we must not scamper
you must not scamper
they must not scamper 	I must not be scampering
you must not be scampering
she must not be scampering
we must not be scampering
you must not be scampering
they must not be scampering	I must not have scampered
you must not have scampered
she must not have scampered
we must not have scampered
you must not have scampered
they must not have scampered	I must not have been scampering
you must not have been scampering
she must not have been scampering
we must not have been scampering
you must not have been scampering
they must not have been scampering	

Interrogative form 	
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must I scamper?
must you scamper?
must she scamper?
must we scamper?
must you scamper?
must they scamper? 	must I be scampering?
must you be scampering?
must she be scampering?
must we be scampering?
must you be scampering?
must they be scampering? 	must I have scampered?
must you have scampered?
must she have scampered?
must we have scampered?
must you have scampered?
must they have scampered? 	must I have been scampering?
must you have been scampering?
must she have been scampering?
must we have been scampering?
must you have been scampering?
must they have been scampering? 	

Interro-negative form 	
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must I not scamper?
must you not scamper?
must she not scamper?
must we not scamper?
must you not scamper?
must they not scamper? 	must I not be scampering?
must you not be scampering?
must she not be scampering?
must we not be scampering?
must you not be scampering?
must they not be scampering? 	must I not have scampered?
must you not have scampered?
must she not have scampered?
must we not have scampered?
must you not have scampered?
must they not have scampered? 	must I not have been scampering?
must you not have been scampering?
must she not have been scampering?
must we not have been scampering?
must you not have been scampering?
must they not have been scampering?