高中英语人教版 (2019)选择性必修 第一册Unit 5 Working the Land图文ppt课件

这是一份高中英语人教版 (2019)选择性必修 第一册Unit 5 Working the Land图文ppt课件，共21页。PPT课件主要包含了考点追击，That，语法精讲，whether等内容，欢迎下载使用。
在主从复合句中，充当主语的从句是主语从句。它是名词性从句之一，使用陈述句语序。
引导的连接词有从属连词、连接代词和连接副词。
引导主语从句只起引导作用，在主语从句中不充当任何成分。例：That price will g up is certain. Whether we g by train r by bat makes n difference.
that无意义，不能省略
whether 意为“是否” ，可置于句首句末，if 不可置于句首
在句中不仅起连接词的作用，并充当句中的主语、宾语或表语。
2. 连接代词: wh、whever、whm、whse、what、whatever、which、whichever
例：What India needs is a law t make land wnership fairer. Wh will be the president is still unknwn.
引导名词性从句时不仅起连接词的作用，也在句中作状语。When we’ll start tmrrw will be tld sn.Why he came here is nt knwn.
为了避免主语冗长，句子头重脚轻。经常用 it 作形式主语。例：That the earth is rund is knwn t all. =It is knwn t all that the earth is rund.
1. 主语从句作主语时，谓语多用单数；2. what引导的主语从句，可根据表语决定主语动词的单复数。例：Whether Mary came r nt is nne f yur business. What yu said is f great imprtance. What yu left are several bks.
1. _______ he made an imprtant speech at the meeting was true.
解析：主语从句中，不缺成分，用that引导。
2. _______ is knwn t us all that America is a develped cuntry.
解析： that America is a develped cuntry是真正的主语从句，句首用it充当形式主语。
it 作形式主语的主语从句
e.g. It’s a pity that yu missed the exciting ftball match. 
由于主语从句过长，为了避免头重脚轻，常用it作形式主语，而把主语从句放在句末。
clear, bvius, likely, prbable, surprising…
It + be +形容词+主语从句 做是的
例：It was surprising that she passed the difficult exam. It is nt clear whether he tld a lie.
Attentin：此句型中的形容词是imprtant， necessary等时，从句应该使用虚拟语气。例：It is imprtant that we (shuld) learn English well.
said, reprted, believed, thught, annunced…
2. It + be+过去分词+主语从句 据
例：It is said that they are identical twins. It is reprted that a big earthquake hit the area.
Attentin：如果过去分词是suggested, rdered, required, advised, requested等表示建议、要求、命令等词时，从句应该使用虚拟语气。例：It is suggested that students (shuld) make their bed by themselves.
pity, hnr, gd idea, fact, gd news …
3. It +be +名词+主语从句 做是的
例：It is a pity that he missed such an interesting film, It is gd news that he has recvered.
seem, happen, appear, lk, ccur, turn ut …
4. It+不及物动词+主语从句
例：It happened that they were ut that day. 碰巧那天他们不在家。
wrry, shck …
5. It+及物动词+宾语+主语从句
例：It shcks me that he failed in this exam. 他没通过考试，震惊到我了。
1. ____is a fact that English is being accepted as an internatinal language.
解析： 本题考查“It+be+名词+that的主语从句”，其中it位于句首作形式主语。
2. It is uncertain _______ he can cme t Jenny’s birthday party r nt.
解析： 在主语从句中不缺成分，缺少“是否” 的概念，用whether。