重点短语 重点句型 重点单词 ◆特别提醒 exist没有被动语态,也不能用于进行时态。 ◆现学活用 单句填空 1.They can’t exist on the money he’s earning. 2.It has been in existence(exist) for more than 500 years.

　　重点短语 重点句型 重点单词 ❹puzzle vt.& vi.(使)迷惑;(使)为难;(使)窘困 n.(游戏的)猜谜,谜;难题 How life began on earth is one of the biggest puzzles that scientists found hard to solve.地球上的生命如何起源是科学家们难以解决的最大难题之一。(教材原句P27) But his curiosity was difficult to control and this new computer really puzzled him.但是他的好奇心难以控制,这台新电脑也确实使他费解。 Her decision was a puzzle to him.她的决定对他来说是个谜。 ◆常见用法 1.puzzle about/over 冥思苦想,苦苦思索 be puzzled by被……迷惑 2.be in a puzzle 感到困惑;不知如何是好 be in a puzzle about对……困惑不解 重点短语 重点句型 重点单词 I saw him puzzling over/about a puzzling math problem.我看见他正在苦苦思考一道令人费解的数学题。  ◆拓展延伸 1.puzzling adj.令人迷惑的 2.puzzled adj.迷惑不解的,困惑的 be puzzled about 对……迷惑不解 ◆现学活用 单句改错 1.The puzzling look on her face suggested she didn’t understand what I said.(puzzling改为puzzled) 2.I’m in puzzle as to what to do next.(在in后加a)

　　重点短语 重点句型 重点单词 ❺pull n.& vt.拉(力);拖;牵引力 As the rocket rose into the air,we were pushed back into our seats because we were trying to escape the pull of the earth’s gravity.随着火箭的升空,由于我们在努力挣脱地球的引力,我们被向后推在座位上。(教材原句P30) ◆常见用法 pull up拔起;停车;阻止 pull off 脱(衣、帽等) pull on 匆忙穿戴(袜子、手套等) pull through 康复;完成;使渡过难关 pull out 离站;抽出,取出 pull in (火车)进站;(船)靠岸;(车)驶向路边停靠 pull down拆毁;摧毁

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