English verb conjugation
MUST WHISTLE-STOP

Regular verb: whistle-stop - whistle-stoped - whistle-stoped

Affirmation

Simple form	V-ing form
I must whistle-stop you must whistle-stop he must whistle-stop we must whistle-stop you must whistle-stop they must whistle-stop	I must be whistle-stoping you must be whistle-stoping he must be whistle-stoping we must be whistle-stoping you must be whistle-stoping they must be whistle-stoping
Perfect	V-ing perfect
I must have whistle-stoped you must have whistle-stoped he must have whistle-stoped we must have whistle-stoped you must have whistle-stoped they must have whistle-stoped	I must have been whistle-stoping you must have been whistle-stoping he must have been whistle-stoping we must have been whistle-stoping you must have been whistle-stoping they must have been whistle-stoping

Negation

Simple form	V-ing form
I mustn't whistle-stop you mustn't whistle-stop he mustn't whistle-stop we mustn't whistle-stop you mustn't whistle-stop they mustn't whistle-stop	I mustn't be whistle-stoping you mustn't be whistle-stoping he mustn't be whistle-stoping we mustn't be whistle-stoping you mustn't be whistle-stoping they mustn't be whistle-stoping
Perfect	V-ing perfect
I mustn't have whistle-stoped you mustn't have whistle-stoped he mustn't have whistle-stoped we mustn't have whistle-stoped you mustn't have whistle-stoped they mustn't have whistle-stoped	I mustn't have been whistle-stoping you mustn't have been whistle-stoping he mustn't have been whistle-stoping we mustn't have been whistle-stoping you mustn't have been whistle-stoping they mustn't have been whistle-stoping

Interrogative form

Simple form	V-ing form
must I whistle-stop? must you whistle-stop? must he whistle-stop? must we whistle-stop? must you whistle-stop? must they whistle-stop?	must I be whistle-stoping? must you be whistle-stoping? must he be whistle-stoping? must we be whistle-stoping? must you be whistle-stoping? must they be whistle-stoping?
Perfect	V-ing perfect
must I have whistle-stoped? must you have whistle-stoped? must he have whistle-stoped? must we have whistle-stoped? must you have whistle-stoped? must they have whistle-stoped?	must I have been whistle-stoping? must you have been whistle-stoping? must he have been whistle-stoping? must we have been whistle-stoping? must you have been whistle-stoping? must they have been whistle-stoping?

Interro-negative form

Simple form	V-ing form
mustn't I whistle-stop? mustn't you whistle-stop? mustn't he whistle-stop? mustn't we whistle-stop? mustn't you whistle-stop? mustn't they whistle-stop?	mustn't I be whistle-stoping? mustn't you be whistle-stoping? mustn't he be whistle-stoping? mustn't we be whistle-stoping? mustn't you be whistle-stoping? mustn't they be whistle-stoping?
Perfect	V-ing perfect
mustn't I have whistle-stoped? mustn't you have whistle-stoped? mustn't he have whistle-stoped? mustn't we have whistle-stoped? mustn't you have whistle-stoped? mustn't they have whistle-stoped?	mustn't I have been whistle-stoping? mustn't you have been whistle-stoping? mustn't he have been whistle-stoping? mustn't we have been whistle-stoping? mustn't you have been whistle-stoping? mustn't they have been whistle-stoping?