could tree
Verbo regular: tree - treed- treed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could tree
you could tree
he could tree
we could tree
you could tree
they could tree 	I could be treeing
you could be treeing
he could be treeing
we could be treeing
you could be treeing
they could be treeing	I could have treed
you could have treed
he could have treed
we could have treed
you could have treed
they could have treed	I could have been treeing
you could have been treeing
he could have been treeing
we could have been treeing
you could have been treeing
they could have been treeing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not tree
you could not tree
he could not tree
we could not tree
you could not tree
they could not tree 	I could not be treeing
you could not be treeing
he could not be treeing
we could not be treeing
you could not be treeing
they could not be treeing	I could not have treed
you could not have treed
he could not have treed
we could not have treed
you could not have treed
they could not have treed	I could not have been treeing
you could not have been treeing
he could not have been treeing
we could not have been treeing
you could not have been treeing
they could not have been treeing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I tree?
could you tree?
could he tree?
could we tree?
could you tree?
could they tree? 	could I be treeing?
could you be treeing?
could he be treeing?
could we be treeing?
could you be treeing?
could they be treeing? 	could I have treed?
could you have treed?
could he have treed?
could we have treed?
could you have treed?
could they have treed? 	could I have been treeing?
could you have been treeing?
could he have been treeing?
could we have been treeing?
could you have been treeing?
could they have been treeing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not tree?
could you not tree?
could he not tree?
could we not tree?
could you not tree?
could they not tree? 	could I not be treeing?
could you not be treeing?
could he not be treeing?
could we not be treeing?
could you not be treeing?
could they not be treeing? 	could I not have treed?
could you not have treed?
could he not have treed?
could we not have treed?
could you not have treed?
could they not have treed? 	could I not have been treeing?
could you not have been treeing?
could he not have been treeing?
could we not have been treeing?
could you not have been treeing?
could they not have been treeing?