could heat
Verbo regular: heat - heated- heated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could heat
you could heat
he could heat
we could heat
you could heat
they could heat 	I could be heating
you could be heating
he could be heating
we could be heating
you could be heating
they could be heating	I could have heated
you could have heated
he could have heated
we could have heated
you could have heated
they could have heated	I could have been heating
you could have been heating
he could have been heating
we could have been heating
you could have been heating
they could have been heating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't heat
you couldn't heat
he couldn't heat
we couldn't heat
you couldn't heat
they couldn't heat 	I couldn't be heating
you couldn't be heating
he couldn't be heating
we couldn't be heating
you couldn't be heating
they couldn't be heating	I couldn't have heated
you couldn't have heated
he couldn't have heated
we couldn't have heated
you couldn't have heated
they couldn't have heated	I couldn't have been heating
you couldn't have been heating
he couldn't have been heating
we couldn't have been heating
you couldn't have been heating
they couldn't have been heating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I heat?
could you heat?
could he heat?
could we heat?
could you heat?
could they heat? 	could I be heating?
could you be heating?
could he be heating?
could we be heating?
could you be heating?
could they be heating? 	could I have heated?
could you have heated?
could he have heated?
could we have heated?
could you have heated?
could they have heated? 	could I have been heating?
could you have been heating?
could he have been heating?
could we have been heating?
could you have been heating?
could they have been heating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I heat?
couldn't you heat?
couldn't he heat?
couldn't we heat?
couldn't you heat?
couldn't they heat? 	couldn't I be heating?
couldn't you be heating?
couldn't he be heating?
couldn't we be heating?
couldn't you be heating?
couldn't they be heating? 	couldn't I have heated?
couldn't you have heated?
couldn't he have heated?
couldn't we have heated?
couldn't you have heated?
couldn't they have heated? 	couldn't I have been heating?
couldn't you have been heating?
couldn't he have been heating?
couldn't we have been heating?
couldn't you have been heating?
couldn't they have been heating?