can tough
Verbo regular: tough - toughed- toughed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can tough
you can tough
he can tough
we can tough
you can tough
they can tough 	I can be toughing
you can be toughing
he can be toughing
we can be toughing
you can be toughing
they can be toughing	I can have toughed
you can have toughed
he can have toughed
we can have toughed
you can have toughed
they can have toughed	I can have been toughing
you can have been toughing
he can have been toughing
we can have been toughing
you can have been toughing
they can have been toughing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't tough
you can't tough
he can't tough
we can't tough
you can't tough
they can't tough 	I can't be toughing
you can't be toughing
he can't be toughing
we can't be toughing
you can't be toughing
they can't be toughing	I can't have toughed
you can't have toughed
he can't have toughed
we can't have toughed
you can't have toughed
they can't have toughed	I can't have been toughing
you can't have been toughing
he can't have been toughing
we can't have been toughing
you can't have been toughing
they can't have been toughing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I tough?
can you tough?
can he tough?
can we tough?
can you tough?
can they tough? 	can I be toughing?
can you be toughing?
can he be toughing?
can we be toughing?
can you be toughing?
can they be toughing? 	can I have toughed?
can you have toughed?
can he have toughed?
can we have toughed?
can you have toughed?
can they have toughed? 	can I have been toughing?
can you have been toughing?
can he have been toughing?
can we have been toughing?
can you have been toughing?
can they have been toughing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I tough?
can't you tough?
can't he tough?
can't we tough?
can't you tough?
can't they tough? 	can't I be toughing?
can't you be toughing?
can't he be toughing?
can't we be toughing?
can't you be toughing?
can't they be toughing? 	can't I have toughed?
can't you have toughed?
can't he have toughed?
can't we have toughed?
can't you have toughed?
can't they have toughed? 	can't I have been toughing?
can't you have been toughing?
can't he have been toughing?
can't we have been toughing?
can't you have been toughing?
can't they have been toughing?