both和all做不定代词的时候,说位置是,一般动词前,定冠词,所有格,数次形容词之前。------对的。I've read both these papers.read是属于一般动词吧,但这里both修饰的是papers. 因此要放在这里。如同:both the boys. 在BE动词或者助动词之后-----指BOTH作主语同位语时。eg. They both like apples.They are both students.