can combust
Verbo regular: combust - combusted- combusted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can combust
you can combust
he can combust
we can combust
you can combust
they can combust 	I can be combusting
you can be combusting
he can be combusting
we can be combusting
you can be combusting
they can be combusting	I can have combusted
you can have combusted
he can have combusted
we can have combusted
you can have combusted
they can have combusted	I can have been combusting
you can have been combusting
he can have been combusting
we can have been combusting
you can have been combusting
they can have been combusting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot combust
you cannot combust
he cannot combust
we cannot combust
you cannot combust
they cannot combust 	I cannot be combusting
you cannot be combusting
he cannot be combusting
we cannot be combusting
you cannot be combusting
they cannot be combusting	I cannot have combusted
you cannot have combusted
he cannot have combusted
we cannot have combusted
you cannot have combusted
they cannot have combusted	I cannot have been combusting
you cannot have been combusting
he cannot have been combusting
we cannot have been combusting
you cannot have been combusting
they cannot have been combusting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I combust?
can you combust?
can he combust?
can we combust?
can you combust?
can they combust? 	can I be combusting?
can you be combusting?
can he be combusting?
can we be combusting?
can you be combusting?
can they be combusting? 	can I have combusted?
can you have combusted?
can he have combusted?
can we have combusted?
can you have combusted?
can they have combusted? 	can I have been combusting?
can you have been combusting?
can he have been combusting?
can we have been combusting?
can you have been combusting?
can they have been combusting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not combust?
can you not combust?
can he not combust?
can we not combust?
can you not combust?
can they not combust? 	can I not be combusting?
can you not be combusting?
can he not be combusting?
can we not be combusting?
can you not be combusting?
can they not be combusting? 	can I not have combusted?
can you not have combusted?
can he not have combusted?
can we not have combusted?
can you not have combusted?
can they not have combusted? 	can I not have been combusting?
can you not have been combusting?
can he not have been combusting?
can we not have been combusting?
can you not have been combusting?
can they not have been combusting?