could protect
Verbo regular: protect - protected- protected

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could protect
you could protect
he could protect
we could protect
you could protect
they could protect 	I could be protecting
you could be protecting
he could be protecting
we could be protecting
you could be protecting
they could be protecting	I could have protected
you could have protected
he could have protected
we could have protected
you could have protected
they could have protected	I could have been protecting
you could have been protecting
he could have been protecting
we could have been protecting
you could have been protecting
they could have been protecting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't protect
you couldn't protect
he couldn't protect
we couldn't protect
you couldn't protect
they couldn't protect 	I couldn't be protecting
you couldn't be protecting
he couldn't be protecting
we couldn't be protecting
you couldn't be protecting
they couldn't be protecting	I couldn't have protected
you couldn't have protected
he couldn't have protected
we couldn't have protected
you couldn't have protected
they couldn't have protected	I couldn't have been protecting
you couldn't have been protecting
he couldn't have been protecting
we couldn't have been protecting
you couldn't have been protecting
they couldn't have been protecting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I protect?
could you protect?
could he protect?
could we protect?
could you protect?
could they protect? 	could I be protecting?
could you be protecting?
could he be protecting?
could we be protecting?
could you be protecting?
could they be protecting? 	could I have protected?
could you have protected?
could he have protected?
could we have protected?
could you have protected?
could they have protected? 	could I have been protecting?
could you have been protecting?
could he have been protecting?
could we have been protecting?
could you have been protecting?
could they have been protecting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I protect?
couldn't you protect?
couldn't he protect?
couldn't we protect?
couldn't you protect?
couldn't they protect? 	couldn't I be protecting?
couldn't you be protecting?
couldn't he be protecting?
couldn't we be protecting?
couldn't you be protecting?
couldn't they be protecting? 	couldn't I have protected?
couldn't you have protected?
couldn't he have protected?
couldn't we have protected?
couldn't you have protected?
couldn't they have protected? 	couldn't I have been protecting?
couldn't you have been protecting?
couldn't he have been protecting?
couldn't we have been protecting?
couldn't you have been protecting?
couldn't they have been protecting?