I could recycle you could recycle he could recycle we could recycle you could recycle they could recycle
Forma com V-ing
I could be recycling you could be recycling he could be recycling we could be recycling you could be recycling they could be recycling
Perfeito
I could have recycled you could have recycled he could have recycled we could have recycled you could have recycled they could have recycled
Perfeito com V-ing
I could have been recycling you could have been recycling he could have been recycling we could have been recycling you could have been recycling they could have been recycling
Negação
Forma simple
I couldn't recycle you couldn't recycle he couldn't recycle we couldn't recycle you couldn't recycle they couldn't recycle
Forma com V-ing
I couldn't be recycling you couldn't be recycling he couldn't be recycling we couldn't be recycling you couldn't be recycling they couldn't be recycling
Perfeito
I couldn't have recycled you couldn't have recycled he couldn't have recycled we couldn't have recycled you couldn't have recycled they couldn't have recycled
Perfeito com V-ing
I couldn't have been recycling you couldn't have been recycling he couldn't have been recycling we couldn't have been recycling you couldn't have been recycling they couldn't have been recycling
Forma interrogativa
Forma simple
could I recycle? could you recycle? could he recycle? could we recycle? could you recycle? could they recycle?
Forma com V-ing
could I be recycling? could you be recycling? could he be recycling? could we be recycling? could you be recycling? could they be recycling?
Perfeito
could I have recycled? could you have recycled? could he have recycled? could we have recycled? could you have recycled? could they have recycled?
Perfeito com V-ing
could I have been recycling? could you have been recycling? could he have been recycling? could we have been recycling? could you have been recycling? could they have been recycling?
Forma interro-Negação
Forma simple
couldn't I recycle? couldn't you recycle? couldn't he recycle? couldn't we recycle? couldn't you recycle? couldn't they recycle?
Forma com V-ing
couldn't I be recycling? couldn't you be recycling? couldn't he be recycling? couldn't we be recycling? couldn't you be recycling? couldn't they be recycling?
Perfeito
couldn't I have recycled? couldn't you have recycled? couldn't he have recycled? couldn't we have recycled? couldn't you have recycled? couldn't they have recycled?
Perfeito com V-ing
couldn't I have been recycling? couldn't you have been recycling? couldn't he have been recycling? couldn't we have been recycling? couldn't you have been recycling? couldn't they have been recycling?