can tough
Verbo regular: tough - toughed- toughed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can tough
you can tough
she can tough
we can tough
you can tough
they can tough 	I can be toughing
you can be toughing
she can be toughing
we can be toughing
you can be toughing
they can be toughing	I can have toughed
you can have toughed
she 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
she can have been toughing
we can have been toughing
you can have been toughing
they can have been toughing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can't tough
you can't tough
she 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
she 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
she 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
she 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 com V-ing 	Perfeito 	Perfeito com V-ing 	
can I tough?
can you tough?
can she tough?
can we tough?
can you tough?
can they tough? 	can I be toughing?
can you be toughing?
can she be toughing?
can we be toughing?
can you be toughing?
can they be toughing? 	can I have toughed?
can you have toughed?
can she 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 she have been toughing?
can we have been toughing?
can you have been toughing?
can they have been toughing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can't I tough?
can't you tough?
can't she 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 she 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 she 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 she have been toughing?
can't we have been toughing?
can't you have been toughing?
can't they have been toughing?