人教高中英语必修三UNIT4单词讲解(共35张PPT)

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常用结构:
pull (sb.) back(使某人)退却;撤回(某人) pull sb. down(指疾病)使某人虚弱 pull sth. down毁坏, 拆毁(如旧建筑物) pull together:齐心协力
单项填空
1.So long as we ______, there’s no mountain top we can’t conquer.
eg1:我写那首歌只是为了让自己高兴。
I write this song just to cheer myself.
eg2: If Andrew sees these great reviews, he'll ____c_h_e_e_r_u__p___. eg3: The gril_c_h_e_e_r_ed__the runners__o_n___.
3.今天该我洗盘子洗碗了。
It’s my turn _t_o____w__a__s_h_ ___u_p__ today.
7.prevent...from… 阻止;制止
eg. His back injury may prevent him from playing in tomorrow’s game. 他背部的伤可能使他参加不了明天的比赛。
The boss ordered us to finish our task ahead of time. 老板命令我们提前完成任务。 Take your time packing, for we still have one and a half
hour. 慢慢整理行李,因为我们还有一个半小时。ห้องสมุดไป่ตู้我们决不能向敌人屈服。 At no time can we give in to the enermy.
at no time
绝不;在任何时候都不(放句首,句子用半倒装)
from time to time不时地,间或;
ahead of time 提前;提早
take one’s time 别着急;慢慢来
in no time
立刻,马上(=at once/immediately)
all the time 一直;始终
6.in one’s turn 轮到某人;
eg. In my turn, I told them a joke.
常用结构:
(1)in turn依次;轮流;转而;反过来; (2)take turns (to do sth./doing sth.)轮流(做某事) (3)It’s one’s turn to do sth.轮到某人做某事
2 . harmful adj. 有害的;造成伤害的;
Many people are aware of the harmful effects of smoking.
很多人都意识到了吸烟的危害。
【联想拓展】
(1)be harmful to 对……有害
(2) harm n.&v. 损害,伤害
do harm to sb.= do sb.harm = harm sb. 对某人有害;
4. break out (战争,火灾,疾病,争吵)突然发生,
爆发
相关短语:break away (from)摆脱,脱离 break down 机器故障,身体垮掉,汽车抛锚,
谈判失败 break in 闯入,打断 break into 破门而入,非法闯入 break one's word/ promise 食言,失言 break up 关系破裂,解散
eg.Their reason for doing it is still a puzzle to me. 他们为什么要做此事我仍莫名其妙。
(3) be a puzzle to sb对某人来说是个谜 【联想拓展】
(4)puzzled adj.迷惑不解的;困惑的 be puzzled about 对……迷惑不解 puzzling adj.令人费解的
eg:An airliner_c_r_a_sh_e_d_west of Dever last night.
eg:The glass fell to the floor___w_i_th__a_c_r_a_s_h___.
2. pull vt. 拉,拖 n. 拉力,牵引力 pull 拉,拖 → push 推
4.puzzle vt. &vi. (使)迷惑;(使)为难 n.谜;难题
(1)puzzle sb. 使某人困惑 Her reply puzzled me. 她的回答把我弄糊涂了。
(2) puzzle about/over …. 对…感到迷惑;苦苦思索;
她几个星期也琢磨不透他那封奇怪的来信。
She’s been _p_u_z_z_l_in_g_o_v_e_r_ his strange letter for weeks.
A.puzzle
B.puzzling
C.puzzled
D.puzzles
解析:选C。句意为:她对她的将来感到迷惑。puzzled(人)迷惑
的,迷惘的;puzzling(物)令人迷惑的。
5.pull n.&vt.拉(力);拖;牵引力 You push and I’ll pull. 你来推,我来拉。
I felt a pull at my sleeve and turned round. 我觉得有人扯我的袖子,便转过身来。 反义词:push 【速记名片】
(3)There is no harm in doing sth. 做某事没有害处
eg. 在学习上取得进步没有任何害处。
There is no harm in making progress on study.
(4) 无害的;不致伤的; harmless
【即学即练】
does harm to
①吸烟有害健康。
If you keep on working hard, you'll succeed in time.
归纳拓展:如果你坚持努力工作,你迟早会成功的。
on time
准时
at the same time同时
at times at one time
有时;偶尔; 一度;曾经有一个时期;
at a time
一次;每次
eg1:A fire_b_r_e_a_k__o_u_tin his house last night. eg2: When the war _b_r_e_a_k__o_u_t_,the old man was
still living in Libya. eg3:The gril__b_r_e_a_k__in__to say the guests had
It's impossible for them to exist on a small income. (2) there exists/esisted…… 某地有…… eg. 在我们公司门口有两个巨大的石狮子。
There exists 2 huge stone lions at our company gate. 拓展: (3) existence n. 存在;生活; come into existence 产生;成立;开始存在; eg.Do you know when the English word"tuhao"c_o_m__e_in_t_o_e_x_is_te_n_c_e__
be careful
(注:watch out和look out后必须加“for”才
能跟宾语!)
eg:The American government warned its citizens_w_a_t_c_h__o_u_t_ for terrorists.
【即学即练】
单项填空
③She felt ______ about her future.
相关短语: pull down 拆毁(建筑物) pull away 开始驶离,开走 pull in 火车进站,驶向路边停靠 pull on 匆忙穿上(衣服) pull of 脱掉 pull through 度过危机,恢复健康
3. cheer v. 为...欢呼,喝彩,鼓舞 ① cheer up 感到高兴,感到振奋 ② cheer sb. on 为某人加油,喝彩 ③cheer the victory 为胜利欢呼 ④Cheers! 干杯 cheerful adj. 快乐的,高兴的
Smoking
is harmful to
______ ______ ______
your
health.
3.exist vi. 存在;生存 (无被动,无进行)
Man cannot exist without air. (1) exist on …… 靠……生活、生存 eg.他们靠微薄的收入生存是不可能的。
Unit 4 Astronomy: the science of the stars
vocabulary
1. unlike prep. 与……不同;不像;
eg.Unlike her younger brother, she is very diligent. 和她弟弟不同的是,她很刻苦。
拓展: (1)unlikely adj. 不大可能的;未必会发生的;
arrived. eg3: Their car_b_r_e_a_k__d_o_w_n_.(他们的车出故障了)
5. watch out 密切注视,当心,提防 相关短语:watch over 照看,看守
keep a watch 守望,注视 “当心,注意”
watch out
look out
take care
keep
from cuting down
1. crash
1)vt./vi. 碰撞,坠落
crash into...
冲入,撞入
2) n.相撞(事故),飞机的(坠落),坠落声
①a plane/car crash 飞机失事/汽车相撞事故
② with a crash 随着撞击声
eg:The motorcycle__c_ra_s_h_e_d__in_t_o__ the fence.
【即学即练】
③She felt C ______ about her future.
A.puzzle
B.puzzling
C.puzzled
D.puzzles
5.in time 及时;终于;迟早
Will we be in time for the six o'clock train? 我们来得及赶上六点钟的那趟火车吗?
It's unlikely that…… ……的可能性不大 (2)likely adj. 可能的 adv.很可能
It's likely that…… 可能… (3) sb./sth. be likely to do sth. ……有可能做某事 eg.这位影星可能来 The movie star ___is__l_i_ke_l_y___to___c_o_.me
【即学即练】
1.让我们轮流来做这项实验。
Let’s do this experiment ___i_n__ _t_u__r_n_ .
2.你的态度影响别人,它又将会反过来影响你。
Your attitude affects others which ___in___t_u__r_n__ affects you.
A.pull out B.pull in
C.pull together
D.pull back
解析:选C。考查pull短语的辨析。句意为:只要我们团结起来,
就没有我们征服不了的山峰。由句意可知,选C。
6.cheer vt. & vi. (使)高兴、振奋;(对)欢呼 【联想拓展】
cheerful adj.高兴的 cheerless adj.不高兴的 He was greatly cheered by the news. 他听到这个消息非常高兴。
用法点拨:
prevent...(from)= stop...(from) = keep...from 阻止……做…… eg. 应该派一些警察去阻止他们砍树。
Some policeman should be sent to s__to__p___ themc__u_t_i_n_g__d__o_w__nthe trees. prevent cuting down
The crowd cheered loudly as the Queen appeared. 女王出现时群众高声欢呼。
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