人教版英语必修三第四单元

知识讲解语法一点通成果检测???

Unit 4 Astronomy: the science of the stars

编稿：李浩然责编：李万杰

目标认知

重点词汇与短语：

circle； begin with； matter；in time；atmosphere；

multiply；now that； break out；development；in one’s turn

重点句型：

What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.

语法：

主语从句

日常用语：

说明（Instruction）

Please pay attention to... 请注意......

Don’t forget to... 别忘了......

You’d better... 你最好......

Please check that... 请检查......

Make sure that... 确保，确信......

You must/ mustn’t... 你必须/ 不得不......

You need... 你需要......

Watch out for... 留心......

Please look at... 请看......

精讲巧练

重点词汇与短语：

1. circle

【原句回放】In our solar system eight planets circle around the sun.

【点拨】

circle n.

(1) 圆。如：draw a circle 画一个圆

(2) 轨道。如：the circle of moon 月亮运行的轨道

(3) 圈子。如：I have a large circle of friends. 我有一个很大的朋友圈。

vt. 环绕如：The moon circles the earth. 月亮绕着地球转。

vi. 盘旋如：A lot of birds were circling overhead. 很多鸟在头顶上方盘旋。

【随时练】

1. The teachers are used to _______ the pupils' spelling mistakes in red ink.

A. write

B. mark

C. circle

D. circling

2. The birds were _______ around over the lake.

A. circled B．fly C. circle D. circling

【答案与解析】

1. D。本题考察词的辨析。教师习惯于用红笔圈出学生的拼写错误。be used to doing 习惯于。

2. D。本题考察circle的固定搭配. 句意：鸟儿在湖面上空绕圈子，表示在湖面上方盘旋。

2．begin with

【原句回放】The universe began with a “Big Bang” that threw matter in all directions.

【点拨】

begin with 为动词词组, 意为“以……开始”，意义和“start with”相同。

如：The meeting began with a song. 会议是以一首歌开始的。

We began our meeting with a song. 我们开始开会是以一首歌开始的。

【拓展】 to begin with 有两个意思1.第一（firstly）.2.刚开始的时候（at first）如：

(1) I don’t go to the party, to begin with I have no ticket, secondly. I don’t like

the party. 我不想去晚会，第一，我没有票，第二，我不喜欢这个晚会。

(2) To begin with he had no money but later he became rich.

刚开始的时候他没钱，可是后来他变得有钱了。

【随时练】

1. We can't go, _______ it's too cold.

A. to begin with

B. at first

C. begin with

D. first

2. _____, we must consider the faculties of the staff carefully

A. First

B. At first

C. Begin with

D. To begin with

【答案与解析】

这两题都是考察 to begin with 的用法。在两句中都表示首先的意思。

1. A。句意为：我们不能去。首先，天太冷了。

2. D。句意为：首先，我们必须全面地考虑全体员工的素质。

3．matter

【原句回放】The universe began with a “Big Bang” that threw matter in all directions.

【点拨】

matter n. 物质，事情，问题，毛病，内容，实质

如：The universe is made up of matter. 世界是由物质组成的。

I have a lot of matters to do. 我有很多事情要去做。

I know nothing about the matter. 我对这事什么都不知道。

What’s the matter with your bike？你的自行车出什么毛病了？