could collate
Verbo regular: collate - collated- collated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could collate
you could collate
she could collate
we could collate
you could collate
they could collate 	I could be collating
you could be collating
she could be collating
we could be collating
you could be collating
they could be collating	I could have collated
you could have collated
she could have collated
we could have collated
you could have collated
they could have collated	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	

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