could trickle
Verbo regular: trickle - trickled- trickled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could trickle
you could trickle
he could trickle
we could trickle
you could trickle
they could trickle 	I could be trickling
you could be trickling
he could be trickling
we could be trickling
you could be trickling
they could be trickling	I could have trickled
you could have trickled
he could have trickled
we could have trickled
you could have trickled
they could have trickled	I could have been trickling
you could have been trickling
he could have been trickling
we could have been trickling
you could have been trickling
they could have been trickling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not trickle
you could not trickle
he could not trickle
we could not trickle
you could not trickle
they could not trickle 	I could not be trickling
you could not be trickling
he could not be trickling
we could not be trickling
you could not be trickling
they could not be trickling	I could not have trickled
you could not have trickled
he could not have trickled
we could not have trickled
you could not have trickled
they could not have trickled	I could not have been trickling
you could not have been trickling
he could not have been trickling
we could not have been trickling
you could not have been trickling
they could not have been trickling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I trickle?
could you trickle?
could he trickle?
could we trickle?
could you trickle?
could they trickle? 	could I be trickling?
could you be trickling?
could he be trickling?
could we be trickling?
could you be trickling?
could they be trickling? 	could I have trickled?
could you have trickled?
could he have trickled?
could we have trickled?
could you have trickled?
could they have trickled? 	could I have been trickling?
could you have been trickling?
could he have been trickling?
could we have been trickling?
could you have been trickling?
could they have been trickling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not trickle?
could you not trickle?
could he not trickle?
could we not trickle?
could you not trickle?
could they not trickle? 	could I not be trickling?
could you not be trickling?
could he not be trickling?
could we not be trickling?
could you not be trickling?
could they not be trickling? 	could I not have trickled?
could you not have trickled?
could he not have trickled?
could we not have trickled?
could you not have trickled?
could they not have trickled? 	could I not have been trickling?
could you not have been trickling?
could he not have been trickling?
could we not have been trickling?
could you not have been trickling?
could they not have been trickling?