could isolate
Verbo regular: isolate - isolated- isolated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could isolate
you could isolate
she could isolate
we could isolate
you could isolate
they could isolate 	I could be isolating
you could be isolating
she could be isolating
we could be isolating
you could be isolating
they could be isolating	I could have isolated
you could have isolated
she could have isolated
we could have isolated
you could have isolated
they could have isolated	I could have been isolating
you could have been isolating
she could have been isolating
we could have been isolating
you could have been isolating
they could have been isolating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not isolate
you could not isolate
she could not isolate
we could not isolate
you could not isolate
they could not isolate 	I could not be isolating
you could not be isolating
she could not be isolating
we could not be isolating
you could not be isolating
they could not be isolating	I could not have isolated
you could not have isolated
she could not have isolated
we could not have isolated
you could not have isolated
they could not have isolated	I could not have been isolating
you could not have been isolating
she could not have been isolating
we could not have been isolating
you could not have been isolating
they could not have been isolating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I isolate?
could you isolate?
could she isolate?
could we isolate?
could you isolate?
could they isolate? 	could I be isolating?
could you be isolating?
could she be isolating?
could we be isolating?
could you be isolating?
could they be isolating? 	could I have isolated?
could you have isolated?
could she have isolated?
could we have isolated?
could you have isolated?
could they have isolated? 	could I have been isolating?
could you have been isolating?
could she have been isolating?
could we have been isolating?
could you have been isolating?
could they have been isolating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not isolate?
could you not isolate?
could she not isolate?
could we not isolate?
could you not isolate?
could they not isolate? 	could I not be isolating?
could you not be isolating?
could she not be isolating?
could we not be isolating?
could you not be isolating?
could they not be isolating? 	could I not have isolated?
could you not have isolated?
could she not have isolated?
could we not have isolated?
could you not have isolated?
could they not have isolated? 	could I not have been isolating?
could you not have been isolating?
could she not have been isolating?
could we not have been isolating?
could you not have been isolating?
could they not have been isolating?