I could collate you could collate he could collate we could collate you could collate they could collate
Forma com V-ing
I could be collating you could be collating he could be collating we could be collating you could be collating they could be collating
Perfeito
I could have collated you could have collated he could have collated we could have collated you could have collated they could have collated
Perfeito com V-ing
I could have been collating you could have been collating he could have been collating we could have been collating you could have been collating they could have been collating
Negação
Forma simple
I could not collate you could not collate he could not collate we could not collate you could not collate they could not collate
Forma com V-ing
I could not be collating you could not be collating he could not be collating we could not be collating you could not be collating they could not be collating
Perfeito
I could not have collated you could not have collated he could not have collated we could not have collated you could not have collated they could not have collated
Perfeito com V-ing
I could not have been collating you could not have been collating he could not have been collating we could not have been collating you could not have been collating they could not have been collating
Forma interrogativa
Forma simple
could I collate? could you collate? could he collate? could we collate? could you collate? could they collate?
Forma com V-ing
could I be collating? could you be collating? could he be collating? could we be collating? could you be collating? could they be collating?
Perfeito
could I have collated? could you have collated? could he have collated? could we have collated? could you have collated? could they have collated?
Perfeito com V-ing
could I have been collating? could you have been collating? could he have been collating? could we have been collating? could you have been collating? could they have been collating?
Forma interro-Negação
Forma simple
could I not collate? could you not collate? could he not collate? could we not collate? could you not collate? could they not collate?
Forma com V-ing
could I not be collating? could you not be collating? could he not be collating? could we not be collating? could you not be collating? could they not be collating?
Perfeito
could I not have collated? could you not have collated? could he not have collated? could we not have collated? could you not have collated? could they not have collated?
Perfeito com V-ing
could I not have been collating? could you not have been collating? could he not have been collating? could we not have been collating? could you not have been collating? could they not have been collating?