修辞
Rhetoric

第六级你背过“活到老，学到老”“百闻不如一见”“竹篮打水——一场空”，也说过“马马虎虎”“一心一意”。这些话为什么好记、好用？不是因为词特别，而是因为它们的形状特别：有的两半对得整整齐齐，有的三句排在一起，有的拿一样东西比另一样东西。给这些形状起名字，就叫修辞。

You memorised 活到老，学到老 and 百闻不如一见 in level 6, and you use 马马虎虎 and 一心一意 without thinking. What makes them stick is not the words but the shape: two halves matched exactly, or three clauses in a row, or one thing described through another. Naming those shapes is 修辞, rhetoric.

比喻有两头：被说的那样东西，和用来说它的那样东西。用像、好像的时候，两头都在句子里，听的人一看就明白这是打比方；用是的时候，中间的桥拆掉了，语气就重得多。第六级的歇后语几乎都是比喻：竹篮打水，说的其实不是竹篮。

A 比喻 has two ends: the thing talked about and the thing it is talked about through. 像 and 好像 leave both ends visible, so nobody mistakes it for a fact; 是 pulls the bridge away and the claim lands much harder. The xiehouyu of level 6 are nearly all 比喻 — 竹篮打水 is not really about baskets.

排比的条件很简单：结构要一样，数量要够三个。少于三个只是并列，读起来平平常常；到了三个，句子自己就有了节奏，听的人会跟着往下等。写文章想强调什么，最省力的办法就是把它说成排比。

Two conditions only: identical structure, and at least three of them. Two matching parts are mere coordination; at three the sentence acquires a beat and the listener leans forward waiting for the next one. To emphasise something in writing, the cheapest device is to say it three times in the same shape.

对偶只要两半，可是要求比排比严：字数要相等，词类要相当。前人对后人，栽树对乘凉，一个字也不多，一个字也不少。中国的对联、谚语、诗句都建在这个规矩上，所以谚语听一遍就记住了。

对偶 needs only two halves, but its demands are stricter than 排比's: equal syllable count and matching word classes. 前人 answers 后人, 栽树 answers 乘凉, not a character over or under. Couplets, proverbs and classical verse all rest on this, which is why a 谚语 sticks after one hearing.

夸张要说得大家都知道不是真的，这样才安全。他饿得能吃下一头牛，用的是你第五级学的程度补语；度日如年是四个字的成语，说的是日子太难熬。要是夸得让人分不清真假，那就不是修辞，是说错话了。

Exaggeration must be obviously untrue — that is what keeps it honest. 他饿得能吃下一头牛 rides on the degree complement you learned in level 5; 度日如年 packs the same move into four characters. If the hearer cannot tell it is exaggeration, it stops being 修辞 and becomes a false statement.

为什么成语是四个字，不是三个、五个？因为汉语的节奏喜欢两个字一拍，四个字正好两拍，前后还能对起来：马马对虎虎，一心对一意。你写句子的时候，结尾放一个四字格，整句话立刻显得稳。

Why four characters and not three or five? Because Chinese counts rhythm in two-syllable beats: four characters make two clean beats, and the halves can be matched against each other. Ending a sentence on a four-character phrase is the quickest way to make it sound settled.