英语 必修3 unit4 导学案PPT教学课件

If you are to succeed, you must work hard. 单选:
She c to bed whe she received an call form her best friend.
A. w202a0/s12/1g0oing B. would go C. was about to go D. w6ent
将来时间表达法： 1. be to do 2. 2. be about to do 3. 3. will/ shall do 4. I will go to open the door (临时决定） 5. 4. be going to do 6. I am going to London tomorrow( 计划安排） 7. It is going to rain, for it is cloudy.(有迹象表明） 8. 5. do （一般现在时） 9. If it rains tomorrow, I won’t go out.（主将从现） 10.6.be doing（进行时) 210210/.12/10 He is coming tomorrow. （动词多为位移动词，go 7
come，leave，arrive等,表示计划安排）
倍数表达法：
1). 倍数+ as + adj./adv. + as “是……的几倍” My room is three times as large as his.
2). 倍数+ adj./adv.比较级+ than “比……(多/大)几倍” My room is twice larger than his. (减一）
3). We’ ll hold a meeting tomorrow. = We __a_r_e__ ___t_o__ ____h_o_lda meeting tomorrow. = A
meeting is _t_o____ ___b_e__ ___h_e_l_d tomorrow. 4). 如果你想要成功，你必须得努力。
+that+of B
2020/1T2/h10e size of my room is three times that of his.
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练习：
到的学生是我们预计的四倍。下面哪一句话时正确的( A)
A.There are four times as many students as we expected. B.There are four times as many as students we expected C.There are four times students as many as we expected
I was about to leave tomorrow (×)
I was about to leave when she came.(√)
而be to do 可以与时间状语连用
H20u20/J12i/1n0tao is to visit . Here is a message for you from your head teacher: you _a_r_e___ ____to__ ____g_o_ to her office after class. (你 的班主任给你一个口信，要你下课后到她的办公室去。) 2). The worst is still __t_o___ __c_o_m_e_ (come). 更糟糕的事 情还会发生。
课前复习 合作探讨1：学生疑问 合作探讨2：教师疑问 本课小结
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学生疑问：
1.be to do 与 be about to do 都可以表示将 来，有何区别？
2.还有哪些形式可以表示将来时？
3.My room is twice as large as his 与 My room is twice larger than his 意思相同吗？
4.Watch out 与watch over 的用法？
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教师疑问：
I think it hard to learn English
I think it is hard to learn English. 请划分以上两个句子句子成分，并指出 其中it 的用法
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3). 倍数+ the +表示长度/高度/宽度等的名词+ of “是…… 的长度/高度/宽度几倍”
My room is three times the size of his. 注意：此结构中常用的名词有：size, height, weight, length, width depth等。
4)表示长度/高度/宽度等的名词+ of A +动词+倍数
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be to do 的用法： ①“按计划或安排将要做的事情”，（通常指非常正式 的计划或官方计划）
Hu Jintao is to visit Japan next week. ②或表示某事“注定发生”。
You are to be famous. ③ If从句中加be to do,含义为“想要”
If we are to be there before ten, we’ll have to go now. ④表示义务（相当于should),命令（相当于must， have to)
My job is to teach English. = My job is teaching Englis. =To teach English is my job. =Teachig English is my job.
与be about to do 区别： be about to do 表示即将，马上就要发生的动作，不与时 间状语连用，但可以和when 引导的状语从句连用。如：
I am to blame for what has happened You are to hand in your homework tomorrow.
小窍门：义务命令和想要
计划安排注定考
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注意： be to do 还可以表示对句子主语的解释说明，此 时to do 作be 的表语，不表时态。