I don’t know that where I can find Jim. （此处that 不应有。）
4. 用连接代词或连接副词引导的名词性从句中，主语和谓语应按陈述句的语序排列。
When we start hasn’t been decided. 我们什么时候出发还没有决定。
5. if 和whether 引导的名词性从句都表示“是否”，它们既有相同点又有不同之处。 1）相同点：
a. 引导宾语从句时多可替换使用 I wonder if / whether you can help me. b. 都可与or 连用
They didn’t say if they wanted meat or fish. 他们没有说他们想要肉还是要鱼。 I don’t care whether it will rain or shine. 我不在意下雨还是晴天。 (2) 不同点：
a. if 不能引导主语从句，但whether可以 Whether he will go remains a question. b. if 不能引导介词的宾语，但whether 可以 It all depends on whether they will support us. c. if 不能引导同位语从句，但whether 可以
例如：You have yet to answer my question, whether I can count on your vote. d. Whether 后可紧接or not，if 后面不能紧接，而必须后移 I don’t care whether or not she will apologize to me. I don’t care if she will apologize to me or not.
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6.同位语从句前面的先行词所包含的名词多为抽象名词。常见的这种先行词还有：
hope, idea, fact, doubt, evidence, belief, message, word, news, promise, question, reply, rumor, likelihood(可能，可能性), (on the )ground(s), (on the) understanding, (with the ) exception 等。 7.that 引导的同位语从句和定语从句的区别
that 在同位语从句中是连词，只起连接作用，无具体词义 同位语从句只对其先行词起解释或说明的作用 同位语从句与其先行词之间是平行并列关系
而that 在定语从句中是关系代词，充当一定的句子成分，并有相关的词义，从句与其先行词之间是修饰与被修饰，限定与被限定的关系。 The news that he was resigning his position proved to be incorrect. The news that was spreading proved to be incorrect. 8.形式主语it
主语从句在句中作主语，通常位于句首，大多数主语从句都可用形式主语it代替
e.g. That he survived the car accident is a miracle =It is a miracle that he survived the car accident. Whether he comes or not makes no difference. =It makes no difference whether he comes or not. How the prisoner escaped is a mystery. =It is a mystery how the prisoner escaped.
当what 引导的主语从句表示“……的东西时”，一般不用it作形式主语，
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whatever, whoever 与 whichever 一般也不用it 作形式主语 What he needs is more money.
Whatever he said has nothing to do with me. 形式宾语it
宾语从句在句中作宾语。在带复合宾语的句子中，it也常被用作形式宾语放在真正宾语that 从句的前面。
We consider it absolutely necessary that we should open our door to he outside world. 表语从句：
表语从句位于系动词后，充当复合句中的表语，引导表语从句的that 通常可以省略。
e.g. It seems (that) it is going to rain. That is why Jane was praised.
That is how Mike got the first prize in the final competition. 表语从句中的特殊结构：
The reason why/that Mike got the first prize in the final competition is that he had both the dream and strong will.
What he saw was that the old man was stealing something in the supermarket. This is because he has both the dream and the strong will.
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