M-7：make head or tail of(it) 了解
A:You look so nervous, why?
A:你似乎很紧张，怎么了？
B:I have an English test tomorrow.
B:我明天要考英语。
A:Oh, I see.
A:原来是这样。
B:I have some trouble in my homework, please do me a favor.
B:我的作业有点难，帮帮忙好吧。
A:What's the problem?
A:有什么问题？
B:I can't make heads or tails of the sentence. Could you please translate it for me?
B:这个句子我弄不懂，你给翻译一下好吗？
A:OK, let me see.
A:行，让我先看一看。
