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where，why，when， because, how， whether 等引导表语从句。 例: The problem is where we should stay. 问题是我们应该待在哪里。 as, as if 引导表语从句 例: It looks as if a shower is coming up. 看样子要下阵雨了 主语是reason 时，常用that 而不用because 引导表语从句。 句型结构是: The reason (why/for which…..) is that …… It/This/That is because…… 例: The reason for his absence is that he was ill. 他缺席的原因是他生病了。 连系动词“appear, look, seem”的两个常用句型 It seems/appears that…. It looks/seems as if/as though……(与事实相符用陈述语气，与事实相反用虚拟语气)
人教高中英语单词mp3 He got full marks in his maths test. 他在数学测试中得了满分。 Each stone was marked with a number. 每个石头上都标明号码。 symbol表示 ＂象征＂的意思，特别强调故意用来包含某一特定意义的东西，或故意构成的传达某一特定意义的事物。 a good luck symbol 好运气的象征 The lion is considered the king of the forest as it is a symbol of courage and power. 狮子被看作百兽之王，是因为它是勇气与权利的象征。 如果主句的主语是idea， advice， suggestion，order， request，requirement 等名词时，表语从句的谓语动词 要用虚拟语气，即（ should＋）动词原形”的形式。 例: My suggestion is that one thousand trees(should)be planted along the river bank. 我的建议就是沿着河岸种植1,000 棵树。 宾语从句 在复合句中起宾语作用的句子叫宾语从句。 连接代词what，who，whom， which 等在从句中可作主语、宾语、表语和定语等。 例: Do you know who has won the game? 你知道谁赢了这场游戏吗？ 连接副词when， where，how，why 等引导宾语从句，在从句中作状语。 例: None of us knows where these new parts can be bought. 我们没有人知道这些新的零件能在哪里买到。 that，if， whether 连接宾语从句，that 没有实际意义，可以省略，而if 和whether 表示“是否”，不能省略。 例: I asked her whether she had looked at the map yet. 我问她是否已经看过这幅地图了。 it 作形式宾语，而宾语从句置于动词find，feel， consider，make，believe， hate， take， owe，have 等词的 学习冠词的难点 在特殊情况下混用a和an 关于a和an的一般区别，同学们可能比较清楚，也不易搞错，但是对于数字和字母前用该用不定冠词a还是an，则是许多考生可能忽略的问题。如： They have an 8-year-old daughter. 他们有一个8岁大的女儿。(数字8在英语中读音与eight同，故其前用an，不用a;类似地，我们要说an 11-year-old child，不能说a 11-year-old boy。) Our daughter sent us an SOS for some more money. 我们的女儿给我们发来了再要点钱的求救信号。(字母s的读音为[es]，它的第一个音为元音，故其前要用an。) The manager was satisfied to see many new products ________ after great effort. A .having developed B .to develop C .developed D .develop The producer comes regularly to collect the cameras ________ to our shop for quality problems. A .returning B .returned C .to return D .to be returned 
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