go under: 被麻醉、失去知觉
He shows up as you go under.
他总是在你昏迷后才出现。

cheat on: 不忠于、不忠实
How can you cheat on me, when I have loved you so?
你怎么可以对我不忠？我是那么地爱你？
I saw you cheat on the exam. I'm going to turn you in to the teacher.
我看到你考试作弊了，我要向老师揭发你。

come over to: 过来、顺便来访
My dishwasher broke down last night; can you come over to have a look?
我的洗碗机坏了，你可过来看看吗？
We can come over to fetch you.
我们可以过来接你。