could while
Verbo regular: while - whiled- whiled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could while
you could while
she could while
we could while
you could while
they could while 	I could be whiling
you could be whiling
she could be whiling
we could be whiling
you could be whiling
they could be whiling	I could have whiled
you could have whiled
she could have whiled
we could have whiled
you could have whiled
they could have whiled	I could have been whiling
you could have been whiling
she could have been whiling
we could have been whiling
you could have been whiling
they could have been whiling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not while
you could not while
she could not while
we could not while
you could not while
they could not while 	I could not be whiling
you could not be whiling
she could not be whiling
we could not be whiling
you could not be whiling
they could not be whiling	I could not have whiled
you could not have whiled
she could not have whiled
we could not have whiled
you could not have whiled
they could not have whiled	I could not have been whiling
you could not have been whiling
she could not have been whiling
we could not have been whiling
you could not have been whiling
they could not have been whiling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I while?
could you while?
could she while?
could we while?
could you while?
could they while? 	could I be whiling?
could you be whiling?
could she be whiling?
could we be whiling?
could you be whiling?
could they be whiling? 	could I have whiled?
could you have whiled?
could she have whiled?
could we have whiled?
could you have whiled?
could they have whiled? 	could I have been whiling?
could you have been whiling?
could she have been whiling?
could we have been whiling?
could you have been whiling?
could they have been whiling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not while?
could you not while?
could she not while?
could we not while?
could you not while?
could they not while? 	could I not be whiling?
could you not be whiling?
could she not be whiling?
could we not be whiling?
could you not be whiling?
could they not be whiling? 	could I not have whiled?
could you not have whiled?
could she not have whiled?
could we not have whiled?
could you not have whiled?
could they not have whiled? 	could I not have been whiling?
could you not have been whiling?
could she not have been whiling?
could we not have been whiling?
could you not have been whiling?
could they not have been whiling?