could laugh
Verbo regular: laugh - laughed- laughed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could laugh
you could laugh
she could laugh
we could laugh
you could laugh
they could laugh 	I could be laughing
you could be laughing
she could be laughing
we could be laughing
you could be laughing
they could be laughing	I could have laughed
you could have laughed
she could have laughed
we could have laughed
you could have laughed
they could have laughed	I could have been laughing
you could have been laughing
she could have been laughing
we could have been laughing
you could have been laughing
they could have been laughing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not laugh
you could not laugh
she could not laugh
we could not laugh
you could not laugh
they could not laugh 	I could not be laughing
you could not be laughing
she could not be laughing
we could not be laughing
you could not be laughing
they could not be laughing	I could not have laughed
you could not have laughed
she could not have laughed
we could not have laughed
you could not have laughed
they could not have laughed	I could not have been laughing
you could not have been laughing
she could not have been laughing
we could not have been laughing
you could not have been laughing
they could not have been laughing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I laugh?
could you laugh?
could she laugh?
could we laugh?
could you laugh?
could they laugh? 	could I be laughing?
could you be laughing?
could she be laughing?
could we be laughing?
could you be laughing?
could they be laughing? 	could I have laughed?
could you have laughed?
could she have laughed?
could we have laughed?
could you have laughed?
could they have laughed? 	could I have been laughing?
could you have been laughing?
could she have been laughing?
could we have been laughing?
could you have been laughing?
could they have been laughing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not laugh?
could you not laugh?
could she not laugh?
could we not laugh?
could you not laugh?
could they not laugh? 	could I not be laughing?
could you not be laughing?
could she not be laughing?
could we not be laughing?
could you not be laughing?
could they not be laughing? 	could I not have laughed?
could you not have laughed?
could she not have laughed?
could we not have laughed?
could you not have laughed?
could they not have laughed? 	could I not have been laughing?
could you not have been laughing?
could she not have been laughing?
could we not have been laughing?
could you not have been laughing?
could they not have been laughing?