同学你好，该知识点来自沪江网校《英语零基础直达职场全能【学霸班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
注意介词后面要用动名词哦
1 He went out of the restaurant without paying the bill.
2 She bought a pair of boots instead of getting a pair of shoes.
3 She was afraid of spending the night alone.
4 After hearing/having heard the news, she fainted.
5 Think carefully before answering my question.
6 On seeing the plane coming towards me, I dashed for cover.

on 相当于“在……时；一……就……”讲时，后跟 V-ing 形式，相当于 as soon as 引导的状语从句。
cover是“掩护”的意思，I dashed for cover我飞奔去找掩护
On seeing the plane coming towards me, I dashed for cover. 看到飞机向我走来，我猛冲过去寻找掩护。

祝同学学习进步~