can underperform
Verbo regular: underperform - underperformed- underperformed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can underperform
you can underperform
he can underperform
we can underperform
you can underperform
they can underperform 	I can be underperforming
you can be underperforming
he can be underperforming
we can be underperforming
you can be underperforming
they can be underperforming	I can have underperformed
you can have underperformed
he can have underperformed
we can have underperformed
you can have underperformed
they can have underperformed	I can have been underperforming
you can have been underperforming
he can have been underperforming
we can have been underperforming
you can have been underperforming
they can have been underperforming	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot underperform
you cannot underperform
he cannot underperform
we cannot underperform
you cannot underperform
they cannot underperform 	I cannot be underperforming
you cannot be underperforming
he cannot be underperforming
we cannot be underperforming
you cannot be underperforming
they cannot be underperforming	I cannot have underperformed
you cannot have underperformed
he cannot have underperformed
we cannot have underperformed
you cannot have underperformed
they cannot have underperformed	I cannot have been underperforming
you cannot have been underperforming
he cannot have been underperforming
we cannot have been underperforming
you cannot have been underperforming
they cannot have been underperforming	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I underperform?
can you underperform?
can he underperform?
can we underperform?
can you underperform?
can they underperform? 	can I be underperforming?
can you be underperforming?
can he be underperforming?
can we be underperforming?
can you be underperforming?
can they be underperforming? 	can I have underperformed?
can you have underperformed?
can he have underperformed?
can we have underperformed?
can you have underperformed?
can they have underperformed? 	can I have been underperforming?
can you have been underperforming?
can he have been underperforming?
can we have been underperforming?
can you have been underperforming?
can they have been underperforming? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not underperform?
can you not underperform?
can he not underperform?
can we not underperform?
can you not underperform?
can they not underperform? 	can I not be underperforming?
can you not be underperforming?
can he not be underperforming?
can we not be underperforming?
can you not be underperforming?
can they not be underperforming? 	can I not have underperformed?
can you not have underperformed?
can he not have underperformed?
can we not have underperformed?
can you not have underperformed?
can they not have underperformed? 	can I not have been underperforming?
can you not have been underperforming?
can he not have been underperforming?
can we not have been underperforming?
can you not have been underperforming?
can they not have been underperforming?