must zing
Verbo regular: zing - zinged- zinged

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must zing
you must zing
he must zing
we must zing
you must zing
they must zing 	I must be zinging
you must be zinging
he must be zinging
we must be zinging
you must be zinging
they must be zinging	I must have zinged
you must have zinged
he must have zinged
we must have zinged
you must have zinged
they must have zinged	I must have been zinging
you must have been zinging
he must have been zinging
we must have been zinging
you must have been zinging
they must have been zinging	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't zing
you mustn't zing
he mustn't zing
we mustn't zing
you mustn't zing
they mustn't zing 	I mustn't be zinging
you mustn't be zinging
he mustn't be zinging
we mustn't be zinging
you mustn't be zinging
they mustn't be zinging	I mustn't have zinged
you mustn't have zinged
he mustn't have zinged
we mustn't have zinged
you mustn't have zinged
they mustn't have zinged	I mustn't have been zinging
you mustn't have been zinging
he mustn't have been zinging
we mustn't have been zinging
you mustn't have been zinging
they mustn't have been zinging	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I zing?
must you zing?
must he zing?
must we zing?
must you zing?
must they zing? 	must I be zinging?
must you be zinging?
must he be zinging?
must we be zinging?
must you be zinging?
must they be zinging? 	must I have zinged?
must you have zinged?
must he have zinged?
must we have zinged?
must you have zinged?
must they have zinged? 	must I have been zinging?
must you have been zinging?
must he have been zinging?
must we have been zinging?
must you have been zinging?
must they have been zinging? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I zing?
mustn't you zing?
mustn't he zing?
mustn't we zing?
mustn't you zing?
mustn't they zing? 	mustn't I be zinging?
mustn't you be zinging?
mustn't he be zinging?
mustn't we be zinging?
mustn't you be zinging?
mustn't they be zinging? 	mustn't I have zinged?
mustn't you have zinged?
mustn't he have zinged?
mustn't we have zinged?
mustn't you have zinged?
mustn't they have zinged? 	mustn't I have been zinging?
mustn't you have been zinging?
mustn't he have been zinging?
mustn't we have been zinging?
mustn't you have been zinging?
mustn't they have been zinging?