must vomit
Regular verb: vomit - vomited- vomited

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must vomit
you must vomit
she must vomit
we must vomit
you must vomit
they must vomit 	I must be vomiting
you must be vomiting
she must be vomiting
we must be vomiting
you must be vomiting
they must be vomiting	I must have vomited
you must have vomited
she must have vomited
we must have vomited
you must have vomited
they must have vomited	I must have been vomiting
you must have been vomiting
she must have been vomiting
we must have been vomiting
you must have been vomiting
they must have been vomiting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't vomit
you mustn't vomit
she mustn't vomit
we mustn't vomit
you mustn't vomit
they mustn't vomit 	I mustn't be vomiting
you mustn't be vomiting
she mustn't be vomiting
we mustn't be vomiting
you mustn't be vomiting
they mustn't be vomiting	I mustn't have vomited
you mustn't have vomited
she mustn't have vomited
we mustn't have vomited
you mustn't have vomited
they mustn't have vomited	I mustn't have been vomiting
you mustn't have been vomiting
she mustn't have been vomiting
we mustn't have been vomiting
you mustn't have been vomiting
they mustn't have been vomiting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I vomit?
must you vomit?
must she vomit?
must we vomit?
must you vomit?
must they vomit? 	must I be vomiting?
must you be vomiting?
must she be vomiting?
must we be vomiting?
must you be vomiting?
must they be vomiting? 	must I have vomited?
must you have vomited?
must she have vomited?
must we have vomited?
must you have vomited?
must they have vomited? 	must I have been vomiting?
must you have been vomiting?
must she have been vomiting?
must we have been vomiting?
must you have been vomiting?
must they have been vomiting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I vomit?
mustn't you vomit?
mustn't she vomit?
mustn't we vomit?
mustn't you vomit?
mustn't they vomit? 	mustn't I be vomiting?
mustn't you be vomiting?
mustn't she be vomiting?
mustn't we be vomiting?
mustn't you be vomiting?
mustn't they be vomiting? 	mustn't I have vomited?
mustn't you have vomited?
mustn't she have vomited?
mustn't we have vomited?
mustn't you have vomited?
mustn't they have vomited? 	mustn't I have been vomiting?
mustn't you have been vomiting?
mustn't she have been vomiting?
mustn't we have been vomiting?
mustn't you have been vomiting?
mustn't they have been vomiting?