before是什么意思

Before是一个常用的英语单词，它的意思是“在……之前”。在日常生活中，我们经常会使用这个词来表示某个事件或行动发生之前的时间点或状态。下面就让我们来看看一些常见的用法和例句。

1. 表示时间点

Before可以用来表示某个事件或行动发生之前的时间点。例如：

- I woke up at 6am, but before that, I had a strange dream.

- The concert starts at 8pm, so we should arrive at the venue before then.

- Before I moved to this city, I lived in a small town.

2. 表示条件

Before也可以用来表示某个事件或行动发生的前提条件。例如：

- You need to finish your homework before you can go out and play.

- Before you start cooking, make sure you have all the necessary ingredients.

- We need to solve this problem before we can move on to the next one.

3. 表示比较

Before还可以用来表示两个事物之间的比较，通常是表示前者更重要、更优先。例如：

- Safety should always come before convenience.

- I would rather be happy than rich, but before that, I need to pay my bills.

- Before we discuss the details, let's talk about the big picture first.

总之，before是一个非常常用的单词，它可以用来表示时间点、条件和比较等多种含义。在写作和口语中，合理运用before可以使语言更加准确、清晰和生动。