can sigh
Verbo regular: sigh - sighed- sighed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can sigh
you can sigh
he can sigh
we can sigh
you can sigh
they can sigh 	I can be sighing
you can be sighing
he can be sighing
we can be sighing
you can be sighing
they can be sighing	I can have sighed
you can have sighed
he can have sighed
we can have sighed
you can have sighed
they can have sighed	I can have been sighing
you can have been sighing
he can have been sighing
we can have been sighing
you can have been sighing
they can have been sighing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot sigh
you cannot sigh
he cannot sigh
we cannot sigh
you cannot sigh
they cannot sigh 	I cannot be sighing
you cannot be sighing
he cannot be sighing
we cannot be sighing
you cannot be sighing
they cannot be sighing	I cannot have sighed
you cannot have sighed
he cannot have sighed
we cannot have sighed
you cannot have sighed
they cannot have sighed	I cannot have been sighing
you cannot have been sighing
he cannot have been sighing
we cannot have been sighing
you cannot have been sighing
they cannot have been sighing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I sigh?
can you sigh?
can he sigh?
can we sigh?
can you sigh?
can they sigh? 	can I be sighing?
can you be sighing?
can he be sighing?
can we be sighing?
can you be sighing?
can they be sighing? 	can I have sighed?
can you have sighed?
can he have sighed?
can we have sighed?
can you have sighed?
can they have sighed? 	can I have been sighing?
can you have been sighing?
can he have been sighing?
can we have been sighing?
can you have been sighing?
can they have been sighing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not sigh?
can you not sigh?
can he not sigh?
can we not sigh?
can you not sigh?
can they not sigh? 	can I not be sighing?
can you not be sighing?
can he not be sighing?
can we not be sighing?
can you not be sighing?
can they not be sighing? 	can I not have sighed?
can you not have sighed?
can he not have sighed?
can we not have sighed?
can you not have sighed?
can they not have sighed? 	can I not have been sighing?
can you not have been sighing?
can he not have been sighing?
can we not have been sighing?
can you not have been sighing?
can they not have been sighing?