could tree
Verbo regular: tree - treed- treed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could tree
you could tree
she could tree
we could tree
you could tree
they could tree 	I could be treeing
you could be treeing
she could be treeing
we could be treeing
you could be treeing
they could be treeing	I could have treed
you could have treed
she 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
she could have been treeing
we could have been treeing
you could have been treeing
they could have been treeing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not tree
you could not tree
she 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
she 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
she 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
she 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 con V-ing 	Perfecto 	Perfecto con V-ing 	
could I tree?
could you tree?
could she tree?
could we tree?
could you tree?
could they tree? 	could I be treeing?
could you be treeing?
could she be treeing?
could we be treeing?
could you be treeing?
could they be treeing? 	could I have treed?
could you have treed?
could she 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 she have been treeing?
could we have been treeing?
could you have been treeing?
could they have been treeing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not tree?
could you not tree?
could she 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 she 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 she 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 she not have been treeing?
could we not have been treeing?
could you not have been treeing?
could they not have been treeing?