Usages of qián
比如 考试 前 很多 学生 都 很 紧张， 不知道 怎么 解决 问题。bǐrú kǎoshì qián hěnduō xuéshēng dōu hěn jǐnzhāng, bùzhīdào zěnme jiějué wèntí.
For example, before exams many students are very nervous and don’t know how to solve their problems.
下班 前 我 常常 喝 一点儿 水。xiàbān qián wǒ chángcháng hē yìdiǎnr shuǐ.
Before getting off work, I often drink a little water.
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