英语人教版八年级下册Unit 5单词讲解...

单词详解！详解！
Unit 5 What were you doing when the rainstorm came?
Section A
1. rainstorm [ˈreɪnstɔ:m] n. 暴风雨
a heavy rainstorm 一场大暴风雨
at the time of the rainstorm
在暴风雨来临时
What were you doing at the time of the
rainstorm?
= What were you doing when the
rainstorm came?
暴风雨来临时你在做什么？

2. alarm [əˈlɑ:m] n. 闹钟
an alarm(clock) 一个闹钟
3. go off (闹钟)发出响声
没有被动语态。
My alarm clock goes off at six in the
morning.
我的闹钟早上六点钟响铃。

4. begin [bɪˈgɪn] v.（began/bɪˈɡæn/)开
始
◆ begin begins beginning began
begun
◆同义词：start
◆ begin+n./to do/doing
=start+n./to do/doing
He began/started his work after a
while.
过了一会儿他开始工作。
What were you doing when I
began/started to read?
= What were you doing when I
began/started reading?
当我开始读书时，你在做什么？
◆ 一般情况下，
begin/start to do
=begin/start doing
下列3种情况下后接to do较好：
① 主语是sth.不是sb.时：
What were you doing when it
began to rain hard?
刚开始下打雨时，你在做什么？
② 本身是-ing形式时：
He is beginning to talk to his
mother.
他将要开始和母亲谈话了。
③ 后接动词与想法，感情有关时，如
understand, know等：
He began to understand me.
他开始理解我了。
注意：start作“动身、发动、开办”等讲时，
不可换用begin。

5. heavily [ˈhevɪli] adv. 在很大程度上;
大量地
heavy adj.→heavily adv.
◆ a heavy rain/snow
注意：形容词heavy不能换用hard。
◆ rain/snow heavily
=rain/snow hard

6. suddenly [ˈsʌdənli] adv. 突然地
◆ sudden adj.→suddenly adv.
He heard a sudden shout.
他听到一声突然而来的喊叫。
◆suddenly adv.
多修饰动词或句子，做状语。置于句
首，句尾，句中（实前be后、助后、情
后）。
Suddenly,I heard a loud noise.
突然，我听到一声巨响。
The rainstorm suddenly came.
暴风雨突然到来了。
It all happened so suddenly.这一切都发
生得那么突然。
【拓展】
suddenly 相当于all of a sudden，但
all of a sudden只修饰句子，置于句
首或句尾。
The earthquake happened all of a
sudden.
= All of a sudden the earthquake
happened.
=The earthquake happened suddenly.
= Suddenly the earthquake happened.
突然，地震发生了。