he gave away all his books.可以改成he gave all his books away吗?

he gave away all his books.可以改成he gave all his books away吗?

可以的
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因为这里的away是副词,名词既可以放在give 和away的中间,也可以放在后面
但是如果这里是代词的话,像it,them等,就只能是give them/it away

可以。give away something 和give something away意思都可以

可以，但一般情况下都用前者。当宾语是一个单词时要放在give 和away之间，但如果宾语是词组或较长时，一般都放在后面，以保持句子的平衡。

可以的