must pet
Verbo regular: pet - petted- petted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must pet
you must pet
he must pet
we must pet
you must pet
they must pet 	I must be petting
you must be petting
he must be petting
we must be petting
you must be petting
they must be petting	I must have petted
you must have petted
he must have petted
we must have petted
you must have petted
they must have petted	I must have been petting
you must have been petting
he must have been petting
we must have been petting
you must have been petting
they must have been petting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't pet
you mustn't pet
he mustn't pet
we mustn't pet
you mustn't pet
they mustn't pet 	I mustn't be petting
you mustn't be petting
he mustn't be petting
we mustn't be petting
you mustn't be petting
they mustn't be petting	I mustn't have petted
you mustn't have petted
he mustn't have petted
we mustn't have petted
you mustn't have petted
they mustn't have petted	I mustn't have been petting
you mustn't have been petting
he mustn't have been petting
we mustn't have been petting
you mustn't have been petting
they mustn't have been petting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I pet?
must you pet?
must he pet?
must we pet?
must you pet?
must they pet? 	must I be petting?
must you be petting?
must he be petting?
must we be petting?
must you be petting?
must they be petting? 	must I have petted?
must you have petted?
must he have petted?
must we have petted?
must you have petted?
must they have petted? 	must I have been petting?
must you have been petting?
must he have been petting?
must we have been petting?
must you have been petting?
must they have been petting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I pet?
mustn't you pet?
mustn't he pet?
mustn't we pet?
mustn't you pet?
mustn't they pet? 	mustn't I be petting?
mustn't you be petting?
mustn't he be petting?
mustn't we be petting?
mustn't you be petting?
mustn't they be petting? 	mustn't I have petted?
mustn't you have petted?
mustn't he have petted?
mustn't we have petted?
mustn't you have petted?
mustn't they have petted? 	mustn't I have been petting?
mustn't you have been petting?
mustn't he have been petting?
mustn't we have been petting?
mustn't you have been petting?
mustn't they have been petting?