must wither
Regular verb: wither - withered- withered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must wither
you must wither
she must wither
we must wither
you must wither
they must wither 	I must be withering
you must be withering
she must be withering
we must be withering
you must be withering
they must be withering	I must have withered
you must have withered
she must have withered
we must have withered
you must have withered
they must have withered	I must have been withering
you must have been withering
she must have been withering
we must have been withering
you must have been withering
they must have been withering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not wither
you must not wither
she must not wither
we must not wither
you must not wither
they must not wither 	I must not be withering
you must not be withering
she must not be withering
we must not be withering
you must not be withering
they must not be withering	I must not have withered
you must not have withered
she must not have withered
we must not have withered
you must not have withered
they must not have withered	I must not have been withering
you must not have been withering
she must not have been withering
we must not have been withering
you must not have been withering
they must not have been withering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I wither?
must you wither?
must she wither?
must we wither?
must you wither?
must they wither? 	must I be withering?
must you be withering?
must she be withering?
must we be withering?
must you be withering?
must they be withering? 	must I have withered?
must you have withered?
must she have withered?
must we have withered?
must you have withered?
must they have withered? 	must I have been withering?
must you have been withering?
must she have been withering?
must we have been withering?
must you have been withering?
must they have been withering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not wither?
must you not wither?
must she not wither?
must we not wither?
must you not wither?
must they not wither? 	must I not be withering?
must you not be withering?
must she not be withering?
must we not be withering?
must you not be withering?
must they not be withering? 	must I not have withered?
must you not have withered?
must she not have withered?
must we not have withered?
must you not have withered?
must they not have withered? 	must I not have been withering?
must you not have been withering?
must she not have been withering?
must we not have been withering?
must you not have been withering?
must they not have been withering?