must slipcover
Regular verb: slipcover - slipcovered- slipcovered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must slipcover
you must slipcover
he must slipcover
we must slipcover
you must slipcover
they must slipcover 	I must be slipcovering
you must be slipcovering
he must be slipcovering
we must be slipcovering
you must be slipcovering
they must be slipcovering	I must have slipcovered
you must have slipcovered
he must have slipcovered
we must have slipcovered
you must have slipcovered
they must have slipcovered	I must have been slipcovering
you must have been slipcovering
he must have been slipcovering
we must have been slipcovering
you must have been slipcovering
they must have been slipcovering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't slipcover
you mustn't slipcover
he mustn't slipcover
we mustn't slipcover
you mustn't slipcover
they mustn't slipcover 	I mustn't be slipcovering
you mustn't be slipcovering
he mustn't be slipcovering
we mustn't be slipcovering
you mustn't be slipcovering
they mustn't be slipcovering	I mustn't have slipcovered
you mustn't have slipcovered
he mustn't have slipcovered
we mustn't have slipcovered
you mustn't have slipcovered
they mustn't have slipcovered	I mustn't have been slipcovering
you mustn't have been slipcovering
he mustn't have been slipcovering
we mustn't have been slipcovering
you mustn't have been slipcovering
they mustn't have been slipcovering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I slipcover?
must you slipcover?
must he slipcover?
must we slipcover?
must you slipcover?
must they slipcover? 	must I be slipcovering?
must you be slipcovering?
must he be slipcovering?
must we be slipcovering?
must you be slipcovering?
must they be slipcovering? 	must I have slipcovered?
must you have slipcovered?
must he have slipcovered?
must we have slipcovered?
must you have slipcovered?
must they have slipcovered? 	must I have been slipcovering?
must you have been slipcovering?
must he have been slipcovering?
must we have been slipcovering?
must you have been slipcovering?
must they have been slipcovering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I slipcover?
mustn't you slipcover?
mustn't he slipcover?
mustn't we slipcover?
mustn't you slipcover?
mustn't they slipcover? 	mustn't I be slipcovering?
mustn't you be slipcovering?
mustn't he be slipcovering?
mustn't we be slipcovering?
mustn't you be slipcovering?
mustn't they be slipcovering? 	mustn't I have slipcovered?
mustn't you have slipcovered?
mustn't he have slipcovered?
mustn't we have slipcovered?
mustn't you have slipcovered?
mustn't they have slipcovered? 	mustn't I have been slipcovering?
mustn't you have been slipcovering?
mustn't he have been slipcovering?
mustn't we have been slipcovering?
mustn't you have been slipcovering?
mustn't they have been slipcovering?