I could collate you could collate she could collate we could collate you could collate they could collate
Forma con V-ing
I could be collating you could be collating she could be collating we could be collating you could be collating they could be collating
Perfecto
I could have collated you could have collated she could have collated we could have collated you could have collated they could have collated
Perfecto con V-ing
I could have been collating you could have been collating she could have been collating we could have been collating you could have been collating they could have been collating
Negación
Forma simple
I could not collate you could not collate she could not collate we could not collate you could not collate they could not collate
Forma con V-ing
I could not be collating you could not be collating she could not be collating we could not be collating you could not be collating they could not be collating
Perfecto
I could not have collated you could not have collated she could not have collated we could not have collated you could not have collated they could not have collated
Perfecto con V-ing
I could not have been collating you could not have been collating she 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 she collate? could we collate? could you collate? could they collate?
Forma con V-ing
could I be collating? could you be collating? could she be collating? could we be collating? could you be collating? could they be collating?
Perfecto
could I have collated? could you have collated? could she have collated? could we have collated? could you have collated? could they have collated?
Perfecto con V-ing
could I have been collating? could you have been collating? could she have been collating? could we have been collating? could you have been collating? could they have been collating?
Forma interro-negativa
Forma simple
could I not collate? could you not collate? could she not collate? could we not collate? could you not collate? could they not collate?
Forma con V-ing
could I not be collating? could you not be collating? could she not be collating? could we not be collating? could you not be collating? could they not be collating?
Perfecto
could I not have collated? could you not have collated? could she not have collated? could we not have collated? could you not have collated? could they not have collated?
Perfecto con V-ing
could I not have been collating? could you not have been collating? could she not have been collating? could we not have been collating? could you not have been collating? could they not have been collating?