英语复习知识点概要on the air/in the air/by air
on one’s arrival…
该词组意为“一到达……就……”（= on arriving…）。如：
On her arrival she helped me to prepare supper.
on one’s way to…正在到……，动身往……，在往……的路上
  He was on his way to school when suddenly a policeman stopped him.
  他正在上学的路上就在这时一个警察截住了他。
  They telephoned to say that they were on the way, but they might be late.
  他们打电话说他们正在路上，但他们可能来晚。
  I called on a friend of mine on my way back.
  我在回来的路上拜访了我的一个朋友。
  You mustn’t forget to call in at Brown’s on the way home.

  你千万别忘了在回家的路上到布朗先生家拜访。

初二下册英语电子课本
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高中英语教材

  拓展：by the way顺便说；in the way挡道；in a way 某种意义上；lose one’s way迷路；by way of 途经，经由；work one’s way 通过苦干……；no way决不；make one’s way 前进；all the way to…一路至……

on the air/in the air/by air/in the open air
on the air表示(用无线电、电视)播送节目。如：
What’s on the air this evening?今晚的广播内容是什么？
These programmes come on the air everyday. 这些节目每天广播。
其反义词为go off the air“停止广播”。如
This radio station goes off the air at midnight.这家广播电台于午夜停止广播。
in the air表示“在空中、在流传中、（问题，计划等）悬而未决（未确定的）、充满了（某种）气氛”。如：
There was dampness in the air.空气潮湿。
Bofore the matter was publicly announced, it had long been in the air.这件事在公诸于世之前早就传得满城风雨了。
The plan is quite in the air.这个计划还很渺茫。
The Spring  Festival was in the air for weeks before.几周前就充满了春节的气氛。
by air 表示“乘飞机、由航空”。如
He went to Shanghai by air.他乘飞机去上海.
in the open air 表示“在户外、在露天里”。如：
People love life in the open air.人们喜欢露天生活。

on the point of…
该短语常在句中作表语，意为“正要（去做某事）”，意思相当于be about to do sth.。如：
We were on the point of calling him up when he came.
对于point名词应掌握它的用法如下：
①if/when it comes to the point如果/当时机到来（时）如：
When it comes to the point,he refused to help.
②from sb.’s point of view从某人的角度来看 如：
Try to look at school from the child’s point of view.

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