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3.宾语从句的语序
4.宾语从句的时态变化
The teaching difficult points(教学难点)
1.宾语从句的时态变化
2.if和whether的区别
3. when与if的用法
The teaching process(教学过程)
Step 1.Lead-in (让学生们造三种句子,引出该堂课的教学内容——宾语从句。eg: I like English. Are you from China?
Where do you live?
Step 2. Presentation
一. 概念:置于动词、介词等词性后面起宾语作用的从句叫宾语从句。如:,
He said he was good at drawing. (动词宾语)
He began to think about what he should do. 他开始考虑应当怎样做。(介词宾语)。
(此外,除了谓语动词、介词能带宾语从句外,动词不定式,动名词形式后面也能带宾语从句,还有些形容词(afraid, sure, glad等)之后也可以带宾语从句。)
二.结构:主语+谓语+连接词+宾语从句
三.种类:根据引词不同,宾语从句可分为三类。
1.由that引导的宾语从句。如果宾语从句是由陈述句充当,用that引导,that无词义,在口语或非正式文体中常省略。如:
The teacher said (that) he is a good student .
The teacher said (that )the earth goes round the sun.。
The teacher said (that) light travels much faster than sound.?
(举此例是为下面讲时态作铺垫)
2.由if或whether引导的当宾语从句。如果宾语从句是由一般疑问句充当,就用if或whether引导,意为“是否”。如:
I don't know if /whether it will rain today。
在宾语从句中,if和whether通常可以互换,但在下列情况下只能用whether:
①在具有选择意义,尤其是直接与or not连用时,往往用whether(if…or not也可以使用)。如:
I don't know whether or not it will rain today。(=I don't know if it will rain or not today。
②在介词之后用whether。如:
I’m thinking about whether it will rain today.
Please let me know if it will rain today.可理解为:
a.Please let me know whether it will rain today.请告诉我今天会不会下雨。