be going to 表示将来，不能用在条件状语从句的主句中；而will则能，表意愿
摘要: 例:Thatlighttravelsinstraightlinesisknowntoall.众所周知，光沿直线运行。Whetherwewillholdapartyintheopenairtomorrowdependsontheweather.明......
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例: That light travels in straight lines is known to all. 众所周知，光沿直线运行。 Whether we will hold a party in the open air tomorrow depends on the weather. 明天我们是否在户外举行聚会要看天气而定。 为了防止句子头重脚轻，通常把形式主语it 放在主语位置，把真正的主语从句放在句末。 例: It's not a surprise that our team have won the game. 我们队赢了比赛，这一点并不奇怪。 It is suggested/ordered/demanded＋that 从句，从句中谓语动词要用虚拟语气，即“（ should＋）动词原形”。 例: It is suggested that the contract( should )be cancelled. 有人建议应该取消合同。 背单词的好方法 随时随地背单词 不知不觉背单词 drill表示＂操练、训练＂的意思。一般指严格的训练或反反复复练习或军事上的练兵。 Let’s do some pattern drills.咱们做些句型练习吧。 The soldiers were at drill in the barrack yard.士兵们在营场上操练。 sign; signal; mark; symbol sign表示 ＂符号、记号、招牌＂等意思。是最普通的用语，指一个具有公认意义的、简单的、随意制定的代表物。 当主语从句作主语时，谓语动词一般用第三人称单数。下面这个句型例外。 例: What we need is more time and money. What we need are many more books. 表语从句 在复合句中起表语作用的句子叫表语从句，从句通常位于连系动词的后面。 that 引导表语从句，表示一件事情，that 只起连接作用，不作任何成分，但是不能省略。 例: The trouble is that I have lost my ID card. 麻烦的是我弄丢了我的身份证。 what 常引导表语从句。 例: The girl is not what she was ten years ago. 这个女孩已经不是10 年前的她了。 Letters are signs used to represent sounds.字母是用来代表声音的符号。 You’ll see the sign for the rest rooms.你将看到休息室的指示牌。 signal表示 ＂暗号、信号＂的意思。有时是有意的;有时是无意的。有意的，如强风讯号、求救信号等。 There the electrical signal is changed back into sound. 在那儿电信号又变成声音。 —Excuse me, which movie are you waiting for? —The new Star Wars. We ________ here for more than two hours. A. waited B. wait C. would be waiting D. have been waiting I ________ half of the English novel, and I’ll try to finish it at the weekend. A. read B. have read C. am reading D. will read
be going to与will / shall, be to do, be about to do用法及区别：A shall / will do表示未事先考虑过，即说话时临时作出的决定。 
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