could group
Verbo regular: group - grouped- grouped

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could group
you could group
he could group
we could group
you could group
they could group 	I could be grouping
you could be grouping
he could be grouping
we could be grouping
you could be grouping
they could be grouping	I could have grouped
you could have grouped
he could have grouped
we could have grouped
you could have grouped
they could have grouped	I could have been grouping
you could have been grouping
he could have been grouping
we could have been grouping
you could have been grouping
they could have been grouping	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't group
you couldn't group
he couldn't group
we couldn't group
you couldn't group
they couldn't group 	I couldn't be grouping
you couldn't be grouping
he couldn't be grouping
we couldn't be grouping
you couldn't be grouping
they couldn't be grouping	I couldn't have grouped
you couldn't have grouped
he couldn't have grouped
we couldn't have grouped
you couldn't have grouped
they couldn't have grouped	I couldn't have been grouping
you couldn't have been grouping
he couldn't have been grouping
we couldn't have been grouping
you couldn't have been grouping
they couldn't have been grouping	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I group?
could you group?
could he group?
could we group?
could you group?
could they group? 	could I be grouping?
could you be grouping?
could he be grouping?
could we be grouping?
could you be grouping?
could they be grouping? 	could I have grouped?
could you have grouped?
could he have grouped?
could we have grouped?
could you have grouped?
could they have grouped? 	could I have been grouping?
could you have been grouping?
could he have been grouping?
could we have been grouping?
could you have been grouping?
could they have been grouping? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I group?
couldn't you group?
couldn't he group?
couldn't we group?
couldn't you group?
couldn't they group? 	couldn't I be grouping?
couldn't you be grouping?
couldn't he be grouping?
couldn't we be grouping?
couldn't you be grouping?
couldn't they be grouping? 	couldn't I have grouped?
couldn't you have grouped?
couldn't he have grouped?
couldn't we have grouped?
couldn't you have grouped?
couldn't they have grouped? 	couldn't I have been grouping?
couldn't you have been grouping?
couldn't he have been grouping?
couldn't we have been grouping?
couldn't you have been grouping?
couldn't they have been grouping?