Time flies 表示时间过得非常快。发现已经过去这么久时，人们会带着惊讶说这句话：孩子已经上学了，或搬家竟然已经一年了。还有一句带轻松意味的说法 time flies when you're having fun，意思是玩得开心时，时间总是过得特别快。这个表达适合日常谈话和 IELTS Speaking，不适合正式作文。
什么情境适合说 time flies？
写一句英语，检查习语是否适合当前情境，以及哪里需要修改。
本次检查比平时稍久，完成后反馈会自动显示在这里。
Time flies! (short comment); How time flies!; time flies when you're having fun
- It feels like this course started yesterday, and now it's already the final week. Time flies!
- We've been living in Manchester for five years now. How time flies!
- We didn't notice it was already two in the morning; time flies when you're having fun.
修改原因
修改前My daughter starts school next week. How fast time runs!
修改后My daughter starts school next week. How fast time flies!
Run 容易让人想到快速移动，所以 time runs 看起来可能合理。但英语表达这里的时间飞逝，用的是 flies，而不是 runs：time flies。Time is running out 是另一个意思，表示剩余时间已经不多。这里把 runs 改成了 flies。
相反的感觉可以用 drag 表达：无聊或等待很久时，时间仿佛过得特别慢。The last hour of the flight really dragged。时间不知不觉就过去了，是 flies；感觉怎么也过不完，则是 drags。
动手练习
I can't believe it's already been a year since we moved to this city. ___!
查看答案
Time flies — I can't believe 表示惊讶：这一年过得太快，让人难以相信。因此用 Time flies。Time drags 会描述时间过得很慢，与这里的情况相反。
想一件感觉刚发生、其实已经过去很久的事，例如搬家、毕业或开始一份工作。写出已经过去多久，并加上 time flies。
I started working at this company exactly three years ago, but it feels like last month. Time flies!
练习把新词用准确
用正在学的词造句。LetsWords 检查用法和语法，提供修改与母语解释，再通过复习巩固。