could crew
Verbo regular: crew - crewed- crewed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could crew
you could crew
he could crew
we could crew
you could crew
they could crew 	I could be crewing
you could be crewing
he could be crewing
we could be crewing
you could be crewing
they could be crewing	I could have crewed
you could have crewed
he could have crewed
we could have crewed
you could have crewed
they could have crewed	I could have been crewing
you could have been crewing
he could have been crewing
we could have been crewing
you could have been crewing
they could have been crewing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't crew
you couldn't crew
he couldn't crew
we couldn't crew
you couldn't crew
they couldn't crew 	I couldn't be crewing
you couldn't be crewing
he couldn't be crewing
we couldn't be crewing
you couldn't be crewing
they couldn't be crewing	I couldn't have crewed
you couldn't have crewed
he couldn't have crewed
we couldn't have crewed
you couldn't have crewed
they couldn't have crewed	I couldn't have been crewing
you couldn't have been crewing
he couldn't have been crewing
we couldn't have been crewing
you couldn't have been crewing
they couldn't have been crewing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I crew?
could you crew?
could he crew?
could we crew?
could you crew?
could they crew? 	could I be crewing?
could you be crewing?
could he be crewing?
could we be crewing?
could you be crewing?
could they be crewing? 	could I have crewed?
could you have crewed?
could he have crewed?
could we have crewed?
could you have crewed?
could they have crewed? 	could I have been crewing?
could you have been crewing?
could he have been crewing?
could we have been crewing?
could you have been crewing?
could they have been crewing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I crew?
couldn't you crew?
couldn't he crew?
couldn't we crew?
couldn't you crew?
couldn't they crew? 	couldn't I be crewing?
couldn't you be crewing?
couldn't he be crewing?
couldn't we be crewing?
couldn't you be crewing?
couldn't they be crewing? 	couldn't I have crewed?
couldn't you have crewed?
couldn't he have crewed?
couldn't we have crewed?
couldn't you have crewed?
couldn't they have crewed? 	couldn't I have been crewing?
couldn't you have been crewing?
couldn't he have been crewing?
couldn't we have been crewing?
couldn't you have been crewing?
couldn't they have been crewing?