can cave
Verbo regular: cave - caved- caved

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can cave
you can cave
he can cave
we can cave
you can cave
they can cave 	I can be caving
you can be caving
he can be caving
we can be caving
you can be caving
they can be caving	I can have caved
you can have caved
he can have caved
we can have caved
you can have caved
they can have caved	I can have been caving
you can have been caving
he can have been caving
we can have been caving
you can have been caving
they can have been caving	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot cave
you cannot cave
he cannot cave
we cannot cave
you cannot cave
they cannot cave 	I cannot be caving
you cannot be caving
he cannot be caving
we cannot be caving
you cannot be caving
they cannot be caving	I cannot have caved
you cannot have caved
he cannot have caved
we cannot have caved
you cannot have caved
they cannot have caved	I cannot have been caving
you cannot have been caving
he cannot have been caving
we cannot have been caving
you cannot have been caving
they cannot have been caving	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I cave?
can you cave?
can he cave?
can we cave?
can you cave?
can they cave? 	can I be caving?
can you be caving?
can he be caving?
can we be caving?
can you be caving?
can they be caving? 	can I have caved?
can you have caved?
can he have caved?
can we have caved?
can you have caved?
can they have caved? 	can I have been caving?
can you have been caving?
can he have been caving?
can we have been caving?
can you have been caving?
can they have been caving? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not cave?
can you not cave?
can he not cave?
can we not cave?
can you not cave?
can they not cave? 	can I not be caving?
can you not be caving?
can he not be caving?
can we not be caving?
can you not be caving?
can they not be caving? 	can I not have caved?
can you not have caved?
can he not have caved?
can we not have caved?
can you not have caved?
can they not have caved? 	can I not have been caving?
can you not have been caving?
can he not have been caving?
can we not have been caving?
can you not have been caving?
can they not have been caving?