“翻脸不认人”比喻不从长远考虑，稍有矛盾，立刻翻脸，有贬义。在英语中，表示“翻脸不认人”的方法可多了，要随着说话情景的不同，用不同的方式。梦想君教大家用三个短语就可以了。
1. turn against sb.
Zhang Min always turns against us after being helped.
张敏总是在我们帮助她后翻脸不认人。
I will turned against you if you keep on doing like that.
你再那样做我就翻脸不认人了。
2. pretend not to know sb.
Terrible!Last week we had something in Jenny’s home together,but now she pretends not to know me.
糟糕！上周我们在珍妮家一起吃的东西，现在她就翻脸不认人了。
Don’t pretend not to know me.I used to give you a hand when you were in trouble. 别翻脸不认人，过去你有困难我经常帮助过你的。
3. betray sb.
We used to be good friends.Why do you betray me?我们过去是好朋友，为什么别翻脸不认人？
The young man betrayed his mother because she left him alone.年轻人翻脸不认他母亲，因为她丢下他不管。
如你有更多的表达方式，欢迎在评论区交流。
语录网网友总结：第二个例句，I will turned against时态怎么使用的?发出来以前检查一遍吧,