must stall
Regular verb: stall - stalled- stalled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must stall
you must stall
she must stall
we must stall
you must stall
they must stall 	I must be stalling
you must be stalling
she must be stalling
we must be stalling
you must be stalling
they must be stalling	I must have stalled
you must have stalled
she must have stalled
we must have stalled
you must have stalled
they must have stalled	I must have been stalling
you must have been stalling
she must have been stalling
we must have been stalling
you must have been stalling
they must have been stalling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't stall
you mustn't stall
she mustn't stall
we mustn't stall
you mustn't stall
they mustn't stall 	I mustn't be stalling
you mustn't be stalling
she mustn't be stalling
we mustn't be stalling
you mustn't be stalling
they mustn't be stalling	I mustn't have stalled
you mustn't have stalled
she mustn't have stalled
we mustn't have stalled
you mustn't have stalled
they mustn't have stalled	I mustn't have been stalling
you mustn't have been stalling
she mustn't have been stalling
we mustn't have been stalling
you mustn't have been stalling
they mustn't have been stalling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I stall?
must you stall?
must she stall?
must we stall?
must you stall?
must they stall? 	must I be stalling?
must you be stalling?
must she be stalling?
must we be stalling?
must you be stalling?
must they be stalling? 	must I have stalled?
must you have stalled?
must she have stalled?
must we have stalled?
must you have stalled?
must they have stalled? 	must I have been stalling?
must you have been stalling?
must she have been stalling?
must we have been stalling?
must you have been stalling?
must they have been stalling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I stall?
mustn't you stall?
mustn't she stall?
mustn't we stall?
mustn't you stall?
mustn't they stall? 	mustn't I be stalling?
mustn't you be stalling?
mustn't she be stalling?
mustn't we be stalling?
mustn't you be stalling?
mustn't they be stalling? 	mustn't I have stalled?
mustn't you have stalled?
mustn't she have stalled?
mustn't we have stalled?
mustn't you have stalled?
mustn't they have stalled? 	mustn't I have been stalling?
mustn't you have been stalling?
mustn't she have been stalling?
mustn't we have been stalling?
mustn't you have been stalling?
mustn't they have been stalling?