could suction
Verbo regular: suction - suctioned- suctioned

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could suction
you could suction
he could suction
we could suction
you could suction
they could suction 	I could be suctioning
you could be suctioning
he could be suctioning
we could be suctioning
you could be suctioning
they could be suctioning	I could have suctioned
you could have suctioned
he could have suctioned
we could have suctioned
you could have suctioned
they could have suctioned	I could have been suctioning
you could have been suctioning
he could have been suctioning
we could have been suctioning
you could have been suctioning
they could have been suctioning	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't suction
you couldn't suction
he couldn't suction
we couldn't suction
you couldn't suction
they couldn't suction 	I couldn't be suctioning
you couldn't be suctioning
he couldn't be suctioning
we couldn't be suctioning
you couldn't be suctioning
they couldn't be suctioning	I couldn't have suctioned
you couldn't have suctioned
he couldn't have suctioned
we couldn't have suctioned
you couldn't have suctioned
they couldn't have suctioned	I couldn't have been suctioning
you couldn't have been suctioning
he couldn't have been suctioning
we couldn't have been suctioning
you couldn't have been suctioning
they couldn't have been suctioning	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I suction?
could you suction?
could he suction?
could we suction?
could you suction?
could they suction? 	could I be suctioning?
could you be suctioning?
could he be suctioning?
could we be suctioning?
could you be suctioning?
could they be suctioning? 	could I have suctioned?
could you have suctioned?
could he have suctioned?
could we have suctioned?
could you have suctioned?
could they have suctioned? 	could I have been suctioning?
could you have been suctioning?
could he have been suctioning?
could we have been suctioning?
could you have been suctioning?
could they have been suctioning? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I suction?
couldn't you suction?
couldn't he suction?
couldn't we suction?
couldn't you suction?
couldn't they suction? 	couldn't I be suctioning?
couldn't you be suctioning?
couldn't he be suctioning?
couldn't we be suctioning?
couldn't you be suctioning?
couldn't they be suctioning? 	couldn't I have suctioned?
couldn't you have suctioned?
couldn't he have suctioned?
couldn't we have suctioned?
couldn't you have suctioned?
couldn't they have suctioned? 	couldn't I have been suctioning?
couldn't you have been suctioning?
couldn't he have been suctioning?
couldn't we have been suctioning?
couldn't you have been suctioning?
couldn't they have been suctioning?