must undermine
Verbo regular: undermine - undermined- undermined

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must undermine
you must undermine
he must undermine
we must undermine
you must undermine
they must undermine 	I must be undermining
you must be undermining
he must be undermining
we must be undermining
you must be undermining
they must be undermining	I must have undermined
you must have undermined
he must have undermined
we must have undermined
you must have undermined
they must have undermined	I must have been undermining
you must have been undermining
he must have been undermining
we must have been undermining
you must have been undermining
they must have been undermining	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't undermine
you mustn't undermine
he mustn't undermine
we mustn't undermine
you mustn't undermine
they mustn't undermine 	I mustn't be undermining
you mustn't be undermining
he mustn't be undermining
we mustn't be undermining
you mustn't be undermining
they mustn't be undermining	I mustn't have undermined
you mustn't have undermined
he mustn't have undermined
we mustn't have undermined
you mustn't have undermined
they mustn't have undermined	I mustn't have been undermining
you mustn't have been undermining
he mustn't have been undermining
we mustn't have been undermining
you mustn't have been undermining
they mustn't have been undermining	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I undermine?
must you undermine?
must he undermine?
must we undermine?
must you undermine?
must they undermine? 	must I be undermining?
must you be undermining?
must he be undermining?
must we be undermining?
must you be undermining?
must they be undermining? 	must I have undermined?
must you have undermined?
must he have undermined?
must we have undermined?
must you have undermined?
must they have undermined? 	must I have been undermining?
must you have been undermining?
must he have been undermining?
must we have been undermining?
must you have been undermining?
must they have been undermining? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I undermine?
mustn't you undermine?
mustn't he undermine?
mustn't we undermine?
mustn't you undermine?
mustn't they undermine? 	mustn't I be undermining?
mustn't you be undermining?
mustn't he be undermining?
mustn't we be undermining?
mustn't you be undermining?
mustn't they be undermining? 	mustn't I have undermined?
mustn't you have undermined?
mustn't he have undermined?
mustn't we have undermined?
mustn't you have undermined?
mustn't they have undermined? 	mustn't I have been undermining?
mustn't you have been undermining?
mustn't he have been undermining?
mustn't we have been undermining?
mustn't you have been undermining?
mustn't they have been undermining?