a turn against (someone or something):to stop supporting or being friendly to (someone or something)不支持;反目成仇
The senator eventually turned against the war.这位参议员最终反对了这场战争。
She turned against her best friend.她与最好的朋友反目成仇了。
b turn (someone) against (someone):to cause (someone) to stop being friendly toward (someone)使反目成仇;使变得敌对
He tried to turn our friends against us.他企图让朋友们与我们作对。
2
turn (something) against (someone):to use (something) in a way that harms (someone)利用(某事)伤害(某人)
She started turning my argument against me.她开始利用我的论点攻击我。
He tried to turn her many years of experience in Washington against her. [=tried to persuade people that her experience was not a good thing]他试图利用她在华盛顿多年的生活经历攻击她。