could under
Verbo regular: under - undered- undered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could under
you could under
he could under
we could under
you could under
they could under 	I could be undering
you could be undering
he could be undering
we could be undering
you could be undering
they could be undering	I could have undered
you could have undered
he could have undered
we could have undered
you could have undered
they could have undered	I could have been undering
you could have been undering
he could have been undering
we could have been undering
you could have been undering
they could have been undering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not under
you could not under
he could not under
we could not under
you could not under
they could not under 	I could not be undering
you could not be undering
he could not be undering
we could not be undering
you could not be undering
they could not be undering	I could not have undered
you could not have undered
he could not have undered
we could not have undered
you could not have undered
they could not have undered	I could not have been undering
you could not have been undering
he could not have been undering
we could not have been undering
you could not have been undering
they could not have been undering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I under?
could you under?
could he under?
could we under?
could you under?
could they under? 	could I be undering?
could you be undering?
could he be undering?
could we be undering?
could you be undering?
could they be undering? 	could I have undered?
could you have undered?
could he have undered?
could we have undered?
could you have undered?
could they have undered? 	could I have been undering?
could you have been undering?
could he have been undering?
could we have been undering?
could you have been undering?
could they have been undering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not under?
could you not under?
could he not under?
could we not under?
could you not under?
could they not under? 	could I not be undering?
could you not be undering?
could he not be undering?
could we not be undering?
could you not be undering?
could they not be undering? 	could I not have undered?
could you not have undered?
could he not have undered?
could we not have undered?
could you not have undered?
could they not have undered? 	could I not have been undering?
could you not have been undering?
could he not have been undering?
could we not have been undering?
could you not have been undering?
could they not have been undering?