人教版高中英语必修三 unit4 Astronomy the science of the stars重点单词讲解课件（共21页ppt）

(共21张PPT)
1. violent 猛烈的；激烈的；暴力的
Some young people are involved in
violent crime.
Whatever happens, we will never use
violence.
violence n.暴力，猛烈
violently adv. 激烈地，粗暴地
Unit 4
2. in time 及时；最后
They were just in time for the bus.
They were just in time to catch the bus.
You’ll succeed in time.
on time 按时，准时
He will come on time even though it rains.
some time 一些时间
at times 时常
kill time 消磨时间
behind time 落后
all the time 一直
at a time 一次
at this time 这时
at that time 那时
in time of 在....的时候
at the same time 同时
in no time 立刻
in the daytime 在白天
at one time 曾经；一度
for the first time 第一次
from time to time 不时地
time and again 反复地，
time的短语
3. unlike prep. 不同；不像
Unlike her brother, she is diligent.
unlike (反义词)-------
like (喜欢) -------
likely
Sb/It is likely to do sth.
alike adj./adv. 同样地
like（像）
dislike (不喜欢)
adj. 可能的
4. harmful adj. 有害的
harm n./ v. 损害，伤害
harmless adj.无害的
Your smoking can be harmful to the health of your children.
do harm/good to= do sb harm/good
The medicine is harmful to children but does no harm to adults.
There is no harm in doing sth
5. exist vi. 存在，有
existence n. 存在；生存
exist in 存在于 exist on 靠…生存
Nothing exists on the moon as there is no water and no air.
There two huge stone lions at our school company.
come into existence 开始存在；
come into being
exist
6. in one’s turn 轮到某人；接着
When it is in my turn, I am too excited to speak.
It’s one’s turn to do sth.
轮到/该某人做某事
take turns to do sth
in turn 依次；反之，转而
by turns 轮流；交替地
7. prevent/ keep/ stop sb. from doing sth. 阻止某人做某事
What can we do to prevent/stop this disease (from) spreading
We must prevent the water from
(pollute).
在被动语态中，from不可省略。
保护…不受…
protect/defend … from…
being polluted
8. block out 挡住；堵住
An ugly building blocked out the view from the window.
Police blocked out the street after the explosion.
block one’s way
阻碍某人的路
give out
pick out
make out
set out
work out
carry out
分发
挑出；辨别出
辨别出；看出
出发；开始
解决；锻练
实施
9. crash v./n.碰撞；坠落
He experienced a serious car crash today----his car crashed into another car and let out the loud crash of breaking glass.
10. cheer (sb.) up ；感到振奋；使高兴
The crowd cheered up when they saw the team arrive.
He took her to the concert to cheer her up.
cheerful adj. 快乐的，高兴的
Cheers! 干杯！
11. now (that)= since 既然，由于
Now that everybody is here, we can begin the meeting.
because -----as--------
for（用于逗号后，解释说明）
It must have rained last nignt, for the ground is wet.
in that (不位于句首)
She was fortunate in that she had friends to help her.
表示原因的连词：seeing(that)/given(that)/considering(that)鉴于; 考虑到
Seeing (that) he is ill, he is unlikely to come.
Given/Considering their inexperience/ that they are inexperienced，they’ve done a good job.
12. get the hang of 得知 ... 的要领，学会 ... 的窍门
I’ve been trying to get the hang of this new typewriter.
hang out/about/around
hang up
hang on
hang on to
闲逛
挂断电话
稍等一会（hold on)
紧紧抓住
13. break out (战争,争吵,疾病,火灾等)
爆发；突发
The Lugouqiao Incident broke out in 1937.
The audience broke out into thunderous cheers.
break down 出故障；身体垮掉；失败 break up （关系）破裂；打碎；解散break in 强行进入;插话
break into 闯入;突然…起来
break off 中断，
break trough 突破；
break away from 摆脱
break the rules/ law 违反规则/法律
break the records 打破记录
14. pull n. / vt.拉（力）；拖；牵引力
反义词 -----push
pull out 离站
pull in 进站停靠
pull over 把（车）开到路边
pull up停车，停止
pull down 拆毁
pull through 恢复健康
watch out for =look out for
watch out = look out
小心
watch over
照管；保护