必修三 unit 4 Astronomy: the science of the stars 适用学科 适用区域 英语 全国 适用年级 课时时长（分钟） 高一 2课时 1、本单元重点词汇。 知识点 2、倍数的表达。 3、名词性从句中的主语从句。 1、掌握本单元部分单词和短语的基本词义和用法。 2、通过本单元的学习，要求学生熟练掌握主语从句的语用功能。 教学目标 教学重点 通过上下文来教词汇、语法，并引导学生分析长句、难句和复杂句。 教学难点 总结语言材料中有关主语从句的用法和功能并加以应用。 教学过程
一、 课堂导入
Play a game to learn the names and positions of the planets: Venus is next to Mercury. Earth is the third planet.
Mars is between Earth and Jupiter.
Neptune is the furthest planet from the sun. Saturn is between Uranus and Jupiter. Mercury is closest to the sun.
二、复习预习
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教师引导学生复习上节课所学知识点， （以提问、回顾的形式进行），针对上节课
的作业进行讲评、订正、答疑，并通过对主语从句具体用法的分析和扩展导入本节课所要学习的课本知识的学习。
三、知识讲解
考点/易错点1 重点单词与短语学习
violent adj. 暴力的；猛烈的 (回归课本P25)
The earth became so violent that it was not clear whether the shape would last or not. [归纳拓展]
violent criminals: 使用暴力的罪犯 a violent attack: 猛烈的攻击 a violent protest：强烈的抗议 a violent struggle； 激烈的斗争 violent winds and storms 狂风暴雨 violent toothache: 剧烈的牙痛 in time 及时；最后 (回归课本P25)
It exploded loudly with fire and rock. They were in time to produce carbon dioxide, nitrogen water vapor and other gases, which were to make the earth’s atmosphere.
它（地球）巨大的爆炸喷出了烈火与岩石，最终产生了水蒸汽、二氧化碳、氧、氮和其他多
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种气体，从而形成了地球的大气层。
in time: sooner or later; eventually 迟早；最后。 in time(for sth/ to do sth) : not late 及时；不迟。 in/out of time: in/not in the correct time 合/不合节怕。 Eg: I’ll see him in time. 总有一天我会遇见他。
She will be back in time to prepare dinner. 她来得及回来准备晚饭。 [归纳拓展]
The audience clapped in time to the music. 观众合着音乐的节拍拍手。 in no time 立即；马上 at no time 绝不
at a time 一次；每次 at one time 曾经；一度 at times 有时 ahead of time 提前
for the time being 暂时 take one’s time 别着急；慢慢来
It’s high time that sb. did/should do sth.
（sth）be to (do): (something) will definitely happen, or it must happen
不可避免要发生或必须发生。
Eg: They said goodbye, little knowing that they were never to meet again.
他们彼此说了再见，几乎不知道再也不可能见面了。 She is to be honored for this great work.
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【2018——2019学年人教版高一英语】必修三 unit 4 _教案
