2. because引导表语从句时，一般在句型“it(that, this) is because …”中说明原因；而在“it(that, this) is why…”中说明结果。 The teacher was very angry. That was because he was very late. He was very late. That was why the teacher was angry. 3. as if/ as though也可引导表语从句。 It looks as if / as though it were going to rain. 4. 除that和wh-词外，as 也可引导表语从句。 Things are not always as they seem to be. 核心解读五　 同位语从句 1.同位语从句语序为陈述语序，多放在下列词的后面，如：idea, fact, news, hope, wish, promise, doubt, suggestion, truth, question, problem, belief, probability ….对其名词起进一步说明作用，是名词的具体内容。 例14 I have no idea _____ far the airport is from here. A. what　　　　 B. how　　　　 C. it’s　　　 D. that [Key]　 B 例15 There’s a feeling in me _____ we’ll never know what a UFO is not ever. A. that　　　　 B. which　　　　 C. of which　　　　 D. what

[Key]　 A [点拨] that引导的同位语从句修饰feeling 2．That引导同位语从句与定语从句的区别 That引导同位语从句时，在从句中不充当任何成分，只起连接作用，但不可省略，而that在定语从句中可做主语、宾语和表语。作宾语时可省略。 The news that he passed the exam was a great surprise.(同位语从句) The news (that) he told me was a great surprise.(宾语从句) 核心解读六　 名词性从句中的几类问题特别提示 1、当疑问词做主语或主语的定语时的语序不变。 　All of us asked her what was the matter/wrong/ the trouble with her face. (做主语) Tom asked me whose pen was red. (whose 做主语的定语) 2、宾语从句中的插入语常见形式 　1)特殊疑问词+do you think (believe, suppose, say…) Who do you think is the best student in our class? Who do you think can answer the question? What do you suppose happen to her? What time do you think tom will come here? 2)插入语还有you think/ expect等 　 Give it to whoever you think can do the work well.

5．主语从句不可位于句首的四种情况. 　 (1) It is said, (reported) …结构中的主语从句不可提前。 例如： 　　　 It is said that President Jingo will visit our school next week. (Right)　 　　　　That President Jiang will visit our school next week is said. (Wrong)　 　 (2) It happens…, it occurs… 结构中的主语从句不可提前。 例如：　 　　　　It occurred to him that he failed in the examination. (Right) 　　　 That he failed in the examination occurred to him. (Wrong) 　 (3) It doesn’t matter how/whether …结构中的主语从句不可提前。 例如： 　　　 It doesn’t matter whether he is wrong or not. (Right) 　 (4)含主语从句的复合句是疑问句时，主语从句不可提前。 例如： 　　　 Is it likely that it will rain in the evening? (Right) 　　　 Is that will rain in the evening likely? (Wrong) 核心解读三　 宾语从句 宾语从句多做及物动词的、介词的宾语。 1．语序用陈述语序

例10 Someone is ringing the doorbell. Go and see _____ . A. who is he　　 B. who he is　　 C. who is it　　 D who it is [点拨] 作动词see的宾语从句要用陈述语序，当无法区别男女时，用it作主语。 特别提示： 1)特殊疑问词做主语时，次序不再变化。 Please tell us who will give us a talk this weekend! 2)宾语从句的标点符号由主语来决定。 Don’t you think that the light in the room is too dark? 2) 在宾语从句中不能用一般现在时表示将来，也不能用一般过去时表将来。 3) 在doubt的否定句中，doubt后的宾语从句用that,在doubt的肯定句中用Whether或if均可。 We don’t doubt that he will succeed in the research work. I doubt if / whether it is true. We don’t doubt that he can do a good job of it.

例11 We were all surprised when he made it clear that he _____ office soon. A. leaves　　　　 B. would leave　　　　 C. left　　　　 D. had left

[Key]　 B [点拨] 本句子是过去时间，soon的出现就是表示过去将来。干扰项答案A以一般现在实施表示将来时，是适用于条件状语从句，故不正确！ 3．连接词的选用关键要理解、弄清楚各自的含义和在句子中做的成分。 例12 I remember _____ this used to be a quiet village. A. when　　　　 B. how　　　　 C. where　　　　 D. what [Key]　 A [点拨] 本题考查宾语从句的连词。how和 where在从句中分别作地点和方式状语，在此不合题意，而此句是一个完整句子即主系表结构，故排除what。本句欲表示的意思是：“我记得那个时候这里曾经是一个安静的村庄” 例13 I would do _____ I can do to help them. A. that　　　　 B. whatever　　　　 C. which　　　　 D. whichever [Key]　 B [点拨] I can do句中的及物动词do没有宾语，句子不完整，缺句子成分，whatever在句中可以作do的宾语。 4．That 在宾语从句中不可省略的情况。 1)当that引导的宾语从句中的状语紧靠that时，或者说that从句中含有主从复合句时。 I’m sure that if you’ve lost it, you mast pay for it.

2)当宾语从句被it替代时 She has made it clear that she will have nothing to do with the decision. 3)当由两个that引导的从句作同一个动词或介词的宾语时，第二个that不可省。 Tom told the leader (that) Jone had worker very hard and that he wanted him stay. 4)有插入语或其它成分把宾语从句和主句分开时。 He thinks, I’m afraid, that he is always right. 5)当that引导的宾语从句的主语是非谓语动词或主语从句时。 They said that rubbing the girl’s leg might help. 6)从句的主语是that时。 She says that that is a real gold ring. 5．It 可充当形式宾语，代替真正的宾语从句，此时谓语动词除带宾语从句外，还带宾补。 They want to make it clear to the public that they do an important job. 核心解读四　 表语从句 1. 当reason和 cause引导的从句做主语时，其表语从句多用that引导，而不用because引导。 The reason why he was late was that he missed the last bus.

8.四个不同的小球，全部放入编号为1，2，3，4的四个盒子中

(1)随便放(可以有空盒，但球必须都放入盒中)有多少种放法？

(2)四个盒都不空的放法有多少种？

(3)恰有1个空盒的放法有多少种？

(4)恰有1个小球的编号与盒子的编号相同的放法有多少种？

(5)甲球所放盒的编号总小于乙球所放盒的编号的放法有多少种？

7.在∠MON的边OM上有5个异于O点的点，ON上有4个异于O点的点，以这10个点(含O点)为顶点，可以得到多少个三角形？

6.17个篮球队，分成三个组(6，6，5)，第一阶段各组举行单循环赛，第二阶段由各组前两名举行单循环赛，决定冠亚军共举行多少场球赛？若第二阶段中，原同一组的两队免赛共举行多少场球赛？

5.有甲、乙、丙三项任务，甲需2人承担，乙丙各需1人承担，从10人中选出4人承担这三项任务，不同的选法有_________种.

4.(2003年上海春季高考题)8名世界网球顶级选手在上海大师赛上分成两组，每组各4人，分别进行单循环赛，每组决出前两名，再由每组的第一名与另一组的第二名进行淘汰赛，获胜者角逐冠、亚军，败者角逐第3、4名，大师赛共有_________场比赛.

3.用0、1、2、3、4、5、6、7这八个数字组成无重复数字且四个偶数连在一起的八位数字有

A.2563个　　　　　　　　　　　　　　　　　　　　　　　　　　　　 B.3863个

C.2736个　　　　　　　　　　　　　　　　　　　　　　　　　　　　 D.1535个