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1·If you're a slow learner, you can fall behind in regular school.

如果你学得慢，那你在正规学校可能会落后。

2·He didn't want to fall behind in his lessons.

他不想在功课方面落后。

3·With her help, I didn't fall behind in study.

与她的帮助，我没有落后的研究。

4·I have fall behind in my work since last week.

从上周起，我在工作中落后了。

5·You shall fall behind in your exam if you keep playing.

如果你一直玩，你就会在考试中落后。

6·If you don't work hard, you will fall behind in studies.

如果你不努力，你的学习就跟不上。

7·Being addicted to computer games makes him fall behind in his class.

沉溺于电脑游戏使他在班上的成绩落后了。

8·Starting 25 years ago, the United States started to fall behind in relative terms.

从25年前，美国就开始在相关方面落后了。

9·It is something that needs to be kept up or you'll fall behind in the cyberspace world.

这是需要保持或你会落后于网络世界。

10·She urges parents to read to children from an early age so they do not fall behind in school.

她督促家长在孩子年幼时培养他们阅读，以便让他们在学校中不会掉队。