他先前的朋友转而与他作对。用英语怎么说？

他先前的朋友转而与他作对。

His erstwhile friends turned against him.

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

erstwhile

adj. 从前的，以前的，原来的，往昔的；adv. 从前，往昔地；

例句
He fled to America with Phyllis Burton, an erstwhile friend of his wife's.
他和他妻子以前的一个朋友菲莉丝·伯顿一起逃往美国。

friends

n. 朋友( friend的名词复数 )，资助者，同胞，指做傻事或烦人的事而说话者不认识的人；

例句
Old enemies can become new friends even if all their national interests are not in complete accord.
即使国家利益不尽相同，他们也可以化敌为友。

turned

v. （使）转动( turn的过去式和过去分词 )，旋转，（使）改变方向，（使）不适；

例句
With one accord they turned and walked back over the grass.
他们步调一致地转身走过草坪。

against

prep. 反对，对…不利，紧靠，以防；

例句
His hand brushed against hers; it could have been either accidental or deliberate.
就在有意无意间，他的手轻轻拂过她的手。

him

pron. (he的宾格)他；

例句
They said goodbye to him as he got aboard the train at Union Station.
当他在联合火车站登上火车之际，他们向他道别。