Unit4 Astronomy: the science of the stars
复习目标闯关
要点名师讲解
【重点单词】
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【重点短语】
1. in time 及时；终于 【相关短语】
in time for sth./ to do sth. 及时；不迟 in no time 立刻；马上 at no time永不……
at one time 有个时期；曾经；一度 at a time 一次；每次 at times = sometimes 有时 all the time 一直；始终；老是 on time 按时；准时
by the time到……的时候为止 for the time being 暂时；暂且 take one’ s time不着急；慢慢来 kill time 消磨时间
from time to time 不时地，间或
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many a time 常常；多次 once upon a time 从前
at the same time 同时；尽管如此 ahead of time 提前，提早 race against time 争分夺秒
time and again 一次又一次；重复地 keep time (钟表)走得准
keep bad time（钟、表）走得不准 take one’ s time 慢慢来，别急
have a good/nice/hard time (in) doing sth 做某事很…… It’ s (high/about) time that sb. did/ should do sth. 是做某事的时候了 The doctor came in time to save the boy. 医生及时赶来救了那个孩子 You will succeed in time. 你迟早会成功的
I jumped into the river in no time.我立刻跳到了水中。 I lost myself at one time.曾经一度我迷失了我自己。
It’s high time that the government made an adjustment on the export drawback system. 早该到政府对出口滞后体系进行调整的时候了。 【即境活用】______, I lost heart in English
2. prevent...from.... 使……不做事；阻止……做某事
例如： 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。
【辨析】prevent / stop/keep sb. from doing sth
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prevent / stop sb. from doing sth.中的from可省, keep sb. from doing sth.中
from不可省略，因为keep sb. doing sth.是―使某人一直做某事‖之意；但如在被动语态中， 三者的from都不可省；当后接sb’ s doing sth. 作宾语时，只能用prevent或stop，不能用keep， 因为没有keep sb’ s doing sth. 的句型。 【即境活用】根据句子的意思完成句子或翻译。
1). Doctors took action to _______ _______ _______ _______ _______ (防止这种疾病的蔓延). 2). Of course I can’ t _______ your going abroad. 3). 警察阻止他们携带武器。
_______________________________________________________________________________ 【答案】: 1). prevent/stop/keep the disease from spreading 2). prevent / stop
3). The police prevented/stopped/kept them from carrying weapons. = They were prevented/stopped/kept from carrying weapons. 3. now that既然
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4. break out 突发；爆发 【相关短语】
break away from 脱离（党派）；摆脱（控制） break up打碎；拆散；(会议)结束；分裂(解体) break into sth. 强行进入某处
break down毁掉；坏掉；(计划/谈判)失败 break off (使)停止；中断；折断
break one’ s word/promise食言；说话不算数
【辨析】come about/happen/take place/break out/occur
come about 发生，相当于happen, take place。后面不可以给宾语，也不可以使用被动语态。 How did it come about that you got lost?你怎么会迷路了哪？ happen 强调偶然发生
take place 指按计划、按安排发生
break out 多用于指战争、火灾、疾病、疫情的突然爆发 occur 常用于句式： sth occurs to sb
以上这些单词和短语的主语都不可以是人，也不可以用于被动语态 【即境活用】用break短语填空。
1). A terrible earthquake_______ _______ in Qinghai on the morning of April 14, 2010. 2). When do you _______ _______ for Christmas?
3). Negotiations between the two sides have _______ _______. 4). His house was _______ _______ last week.
【答案】 1). broke out 2). break up 3). broken down 4). broken into 【重点句型】 1.
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