fall behind
collocation落后；掉队
If you don't study hard, you will fall behind in class.
如果你不努力学习，你就会在班上落后。
在后面；向后
先理解核心含义，再看它在真实句子里的用法。
在后面；向后
at or to the back or rear
The car behind is honking.
后面的车在按喇叭。
在后面或背面
At or in the rear or back part of something.
向后
In a rearward direction.
在位置、距离、进步、排名、时间等方面落后于
So as to come after someone or something in position, distance, advancement, ranking, time, etc.
在后面或向后
in or to or toward the rear
She looked behind to see if anyone was following.
她回头看是否有人跟踪。
AI contextual example
I left my bag behind.
我把包落下了。
AI contextual example
he followed behind
他跟在后面。
WordNet
seen from behind, the house is more imposing than it is from the front
从后面看,这栋房子比从前面看更气派。
WordNet
Choose the next layer that will help you use behind with more confidence.
Recommended next
Missing: Usage patterns
Complete this area with usage patterns.
Includes Common mistakes & Confusing words
See typical errors learners make and confusing words to avoid.
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
落后；掉队
If you don't study hard, you will fall behind in class.
如果你不努力学习，你就会在班上落后。
留下；留下来
After the meeting, a few people stayed behind to ask questions.
会议结束后，几个人留下来提问。
留下；把⋯⋯抛在后面
He left his old life behind and started a new career.
他把过去的生活抛在脑后，开始了新的事业。
落后；拖后腿
Our company is lagging behind in technology development.
我们公司在技术开发方面落后了。
落后；拖欠
If you get behind on your payments, you may face penalties.
如果你拖欠付款，可能会面临罚款。
落后于计划；晚点
The project is behind schedule and needs to be accelerated.
该项目落后于计划，需要加快进度。
落后于时代
His ideas are behind the times.
他的想法落后于时代。
秘密地；在幕后
The deal was made behind closed doors.
这笔交易是在秘密情况下达成的。
在幕后；私下
She worked hard behind the scenes to make the event a success.
她在幕后努力工作，使活动取得成功。
我们可以把世界抛在身后。
She decided to leave her past behind.
她决定把过去抛在身后。
把一切都抛在脑后。
He fell behind during the marathon.
他在马拉松中落后了。
Use behind naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
将'behind'分解为'be'（是）+'hind'（后），联想'是在后面'。
注意：behind作副词时通常用于描述位置或时间上的落后，在口语和书面语中均常见，属于中性语域。常见语境包括位置（在后面）、时间（迟到）、落后地位（落后）、欠债（拖欠）等。
副词，表示位置在后面，常放在动词后。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, OCTANOVE, WIKTIONARY.