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80课 on average  和on purpose什么意思
请例举一下80课需要掌握的on的搭配

网校学员ur4**在学习新概念英语2、3、4册连读【双11专享班】时提出了此问题,已有1人帮助了TA。

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同学你好,该知识点来自沪江网校《新概念英语2、3、4册连读【双11专享班】》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~
(1)on business,因公
Last month he went to New York on business and had little time to visit friends.
他上月因公事去纽约,几乎没有时间拜访朋友。

(2)on foot,步行
I usually go to work by car, but this morning I went on foot.
我通常开车去上班,但今天上午我是步行去的。

(3)on duty,值班,值班的:
It was Sunday and there was only one doctor on duty.
那天是星期天,只有一位医生在值班。

(4)on the whole,总的看来,总的来说,大体上:
On the whole, he is a hard-working student.
总的来说,他是个用功的学生。

(5)on fire,起火,着火:
Soon the whole building was on fire.
整个大楼很快便都着火了。

(6)on purpose,故意地,有意地,特意地(与by chance相对):
They have come here on purpose to see you.
他们特意来看望你。
She broke the vase on purpose.
她故意把花瓶打碎。

(7)on average,平均,通常:
On average, he works more than ten hours a day.
他平均每天要工作十多个小时。

祝同学学习进步~

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