can preboil
Verbo regular: preboil - preboiled- preboiled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can preboil
you can preboil
he can preboil
we can preboil
you can preboil
they can preboil 	I can be preboiling
you can be preboiling
he can be preboiling
we can be preboiling
you can be preboiling
they can be preboiling	I can have preboiled
you can have preboiled
he can have preboiled
we can have preboiled
you can have preboiled
they can have preboiled	I can have been preboiling
you can have been preboiling
he can have been preboiling
we can have been preboiling
you can have been preboiling
they can have been preboiling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot preboil
you cannot preboil
he cannot preboil
we cannot preboil
you cannot preboil
they cannot preboil 	I cannot be preboiling
you cannot be preboiling
he cannot be preboiling
we cannot be preboiling
you cannot be preboiling
they cannot be preboiling	I cannot have preboiled
you cannot have preboiled
he cannot have preboiled
we cannot have preboiled
you cannot have preboiled
they cannot have preboiled	I cannot have been preboiling
you cannot have been preboiling
he cannot have been preboiling
we cannot have been preboiling
you cannot have been preboiling
they cannot have been preboiling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I preboil?
can you preboil?
can he preboil?
can we preboil?
can you preboil?
can they preboil? 	can I be preboiling?
can you be preboiling?
can he be preboiling?
can we be preboiling?
can you be preboiling?
can they be preboiling? 	can I have preboiled?
can you have preboiled?
can he have preboiled?
can we have preboiled?
can you have preboiled?
can they have preboiled? 	can I have been preboiling?
can you have been preboiling?
can he have been preboiling?
can we have been preboiling?
can you have been preboiling?
can they have been preboiling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not preboil?
can you not preboil?
can he not preboil?
can we not preboil?
can you not preboil?
can they not preboil? 	can I not be preboiling?
can you not be preboiling?
can he not be preboiling?
can we not be preboiling?
can you not be preboiling?
can they not be preboiling? 	can I not have preboiled?
can you not have preboiled?
can he not have preboiled?
can we not have preboiled?
can you not have preboiled?
can they not have preboiled? 	can I not have been preboiling?
can you not have been preboiling?
can he not have been preboiling?
can we not have been preboiling?
can you not have been preboiling?
can they not have been preboiling?