人教高中英语必修3Unit4grammar(共19张PPT)PPT

①It is clear that he told a lie.
②It is natural that she knows everything about it.
③It was surprising that she passed the difficult exam.
类型
（2）it + be + 名词 + 从句
It as an empty subject It 作形式主语
3. 常见句型
3. 常见句型
it作为形式主语的常见句型： （1）It is clear / obvious / true / possible / certain / … that…
It is obvious that he’s late.
学以致用
用“it作形式主语”结构，改写下列句子。
3. Obviously, the old scientist doesn’t care much about money or fame.
_It_i_s_o_b_v_i_o_u_s_t_h_a_t_t_h_e_o_l_d__s_c_ie_n_t_is_t_d_o__e_s_n_’t_c_a_r_e_______ _m_u_c_h__a_b_o_u_t_m__o_n_e_y_o__r _fame.
（7）It doesn’t matter whether / if …
It doesn’t matter if you miss the bus, because there’s another one 15 minutes later.
（8）It looks /seems as if …
It looks as if he is wrong.

—I won’t join them. ——我不和他们一起。 —Why(will you not join them)? ——为什么(你不和他们一起)?
6．动词不定式 —Are you going there? ——你打算去那里吗？ —Yes，I’d like to(go there)． ——是的，我想(去那里)。 —I saw her enter the classroom. ——我看见她进了教室。
2．简洁实用 (I’m) Coming. (我)来啦。 (It) Doesn’t matter. (它)不要紧。 3．句法允许 He got up at six(o’clock)． 他六点(钟)起床。 This dictionary costs seven(dollars) thirty(cents)． 这本词典的费用是7美元30美分。 What a hot day(it is)! 多热的天呀！
UNIT 3 DIVERSE CULTURES
Section Ⅱ Discovering Useful Structures
单元语法精析 语法专题练习
单元语法精析
知识概览
Grammar——省略
探究发现 ①And what a city(it is)—a city that was able to rebuild itself after the earthquake that occurred in 1906. ②My hotel is near downtown，in the Mission District，(which is) one of the oldest parts of the city. ③This district used to be a poor area of town，but (this district) is now a centre for art，music，and food. ④(It is) A real mix of cultures here! ⑤What great food (it is)! ⑥(I) Can’t wait!

best friend.
more formal as written
d. If it is approached in this way, your friendship wlialnl gsouoangeb.e
repaired.
Q4. Why does the author choose to use -ed instead of an adverbial
水加热到100度就沸腾。 ③ (When he was)Asked what had happened, he kept silent.
当被问及发生了什么事时，他保持沉默。
3. 作让步状语: 相当于though / although引导的让步状语从句。
① (Although he was) Tired, he went on working. 虽然他很疲倦，他仍然继续工作。 ② (Although he was) Left alone at home, the little boy didn't feel afraid at all. 虽然他被独自留在家里，小男孩一点也不害怕。
What should Anne do?
P6
Last week, attracted by a particular article in a magazine, Anne bought it.
Activity 2: Read and Rewrite Rewrite the underlined sentences with the -ed form.
4. 作条件状语: 相当于一个条件状语从句
① (If he is)Punished by the parents, he won't come again. 他若是被家长惩罚了，就再也不能来了。

根据迹象 将要发生的事、 即将发生 安排的事。
的事
be about to do
porpoise
It is reported that the porpoises will die out soon.
Look ！ So many rats.
There is going to be an earthquake.
I’m driving around in my car. I’m driving too fast. I’m driving too far. I’d like to change my point of view. I felt so lonely, I’m waiting for you. but nothing ever happens, and i wonder.
7. --- What’s that terrible noise? ---The neighbours ____ for a party. A. have prepared B. are preparing C. prepare D. will prepare
8. Because the shop ____, all the
Little Mei is driving to the island __________________________ tomorrow afternoon.
Mr. Lan is walking to the island ____________________ tonight .
我将两点到达！
15. ----Have you moved into the new house? ----Not yet. The rooms ___. A. are being painting B. are painting