must ping
Verbo regular: ping - pinged- pinged

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must ping
you must ping
she must ping
we must ping
you must ping
they must ping 	I must be pinging
you must be pinging
she must be pinging
we must be pinging
you must be pinging
they must be pinging	I must have pinged
you must have pinged
she must have pinged
we must have pinged
you must have pinged
they must have pinged	I must have been pinging
you must have been pinging
she must have been pinging
we must have been pinging
you must have been pinging
they must have been pinging	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't ping
you mustn't ping
she mustn't ping
we mustn't ping
you mustn't ping
they mustn't ping 	I mustn't be pinging
you mustn't be pinging
she mustn't be pinging
we mustn't be pinging
you mustn't be pinging
they mustn't be pinging	I mustn't have pinged
you mustn't have pinged
she mustn't have pinged
we mustn't have pinged
you mustn't have pinged
they mustn't have pinged	I mustn't have been pinging
you mustn't have been pinging
she mustn't have been pinging
we mustn't have been pinging
you mustn't have been pinging
they mustn't have been pinging	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I ping?
must you ping?
must she ping?
must we ping?
must you ping?
must they ping? 	must I be pinging?
must you be pinging?
must she be pinging?
must we be pinging?
must you be pinging?
must they be pinging? 	must I have pinged?
must you have pinged?
must she have pinged?
must we have pinged?
must you have pinged?
must they have pinged? 	must I have been pinging?
must you have been pinging?
must she have been pinging?
must we have been pinging?
must you have been pinging?
must they have been pinging? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I ping?
mustn't you ping?
mustn't she ping?
mustn't we ping?
mustn't you ping?
mustn't they ping? 	mustn't I be pinging?
mustn't you be pinging?
mustn't she be pinging?
mustn't we be pinging?
mustn't you be pinging?
mustn't they be pinging? 	mustn't I have pinged?
mustn't you have pinged?
mustn't she have pinged?
mustn't we have pinged?
mustn't you have pinged?
mustn't they have pinged? 	mustn't I have been pinging?
mustn't you have been pinging?
mustn't she have been pinging?
mustn't we have been pinging?
mustn't you have been pinging?
mustn't they have been pinging?