can smooth
Verbo regular: smooth - smoothed- smoothed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can smooth
you can smooth
he can smooth
we can smooth
you can smooth
they can smooth 	I can be smoothing
you can be smoothing
he can be smoothing
we can be smoothing
you can be smoothing
they can be smoothing	I can have smoothed
you can have smoothed
he can have smoothed
we can have smoothed
you can have smoothed
they can have smoothed	I can have been smoothing
you can have been smoothing
he can have been smoothing
we can have been smoothing
you can have been smoothing
they can have been smoothing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't smooth
you can't smooth
he can't smooth
we can't smooth
you can't smooth
they can't smooth 	I can't be smoothing
you can't be smoothing
he can't be smoothing
we can't be smoothing
you can't be smoothing
they can't be smoothing	I can't have smoothed
you can't have smoothed
he can't have smoothed
we can't have smoothed
you can't have smoothed
they can't have smoothed	I can't have been smoothing
you can't have been smoothing
he can't have been smoothing
we can't have been smoothing
you can't have been smoothing
they can't have been smoothing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I smooth?
can you smooth?
can he smooth?
can we smooth?
can you smooth?
can they smooth? 	can I be smoothing?
can you be smoothing?
can he be smoothing?
can we be smoothing?
can you be smoothing?
can they be smoothing? 	can I have smoothed?
can you have smoothed?
can he have smoothed?
can we have smoothed?
can you have smoothed?
can they have smoothed? 	can I have been smoothing?
can you have been smoothing?
can he have been smoothing?
can we have been smoothing?
can you have been smoothing?
can they have been smoothing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I smooth?
can't you smooth?
can't he smooth?
can't we smooth?
can't you smooth?
can't they smooth? 	can't I be smoothing?
can't you be smoothing?
can't he be smoothing?
can't we be smoothing?
can't you be smoothing?
can't they be smoothing? 	can't I have smoothed?
can't you have smoothed?
can't he have smoothed?
can't we have smoothed?
can't you have smoothed?
can't they have smoothed? 	can't I have been smoothing?
can't you have been smoothing?
can't he have been smoothing?
can't we have been smoothing?
can't you have been smoothing?
can't they have been smoothing?