must slither
Regular verb: slither - slithered- slithered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must slither
you must slither
she must slither
we must slither
you must slither
they must slither 	I must be slithering
you must be slithering
she must be slithering
we must be slithering
you must be slithering
they must be slithering	I must have slithered
you must have slithered
she must have slithered
we must have slithered
you must have slithered
they must have slithered	I must have been slithering
you must have been slithering
she must have been slithering
we must have been slithering
you must have been slithering
they must have been slithering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't slither
you mustn't slither
she mustn't slither
we mustn't slither
you mustn't slither
they mustn't slither 	I mustn't be slithering
you mustn't be slithering
she mustn't be slithering
we mustn't be slithering
you mustn't be slithering
they mustn't be slithering	I mustn't have slithered
you mustn't have slithered
she mustn't have slithered
we mustn't have slithered
you mustn't have slithered
they mustn't have slithered	I mustn't have been slithering
you mustn't have been slithering
she mustn't have been slithering
we mustn't have been slithering
you mustn't have been slithering
they mustn't have been slithering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I slither?
must you slither?
must she slither?
must we slither?
must you slither?
must they slither? 	must I be slithering?
must you be slithering?
must she be slithering?
must we be slithering?
must you be slithering?
must they be slithering? 	must I have slithered?
must you have slithered?
must she have slithered?
must we have slithered?
must you have slithered?
must they have slithered? 	must I have been slithering?
must you have been slithering?
must she have been slithering?
must we have been slithering?
must you have been slithering?
must they have been slithering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I slither?
mustn't you slither?
mustn't she slither?
mustn't we slither?
mustn't you slither?
mustn't they slither? 	mustn't I be slithering?
mustn't you be slithering?
mustn't she be slithering?
mustn't we be slithering?
mustn't you be slithering?
mustn't they be slithering? 	mustn't I have slithered?
mustn't you have slithered?
mustn't she have slithered?
mustn't we have slithered?
mustn't you have slithered?
mustn't they have slithered? 	mustn't I have been slithering?
mustn't you have been slithering?
mustn't she have been slithering?
mustn't we have been slithering?
mustn't you have been slithering?
mustn't they have been slithering?