Lesson125SUSAN: Cant you come in and have tea now, Peter?PETER: Not yet. I must water the garden first.SUSAN: Do you have to water it now?PETER: Im afraid I must. Look at it! Its terribly dry.SUSAN: What a nuisance!PETER: Last summer it was very dry, too. Dont you remember? I had to water it every day.SUSAN: Well, Ill have tea by myself.SUSAN: That was quick! Have you finished already?PETER: Yes. Look out of the window.SUSAN: Its raining! That means you dont need to water the garden.PERTR: That was a pleasant surprise. It means I can have tea,instead.苏珊：彼得，你现在能进来喝茶吗?彼得：还不能。我得先给花园浇水。苏珊：你一定得现在浇吗?彼得：恐怕我得现在浇。你看看，干得厉害。苏珊：真讨厌!彼得：去年夏天也是干得很。你记得了吗?我不得不每天浇水。苏珊：好吧，我一个喝茶了。苏珊：好快啊!你已经浇完了?彼得：是的。你看看窗外。苏珊：下雨了，这就是就是说，你不必给花园浇水了。彼得：这是意想不能的好事。这意味着我反倒可以喝茶了。【知识点讲解】(一)单词扩展1. water v. 浇水 I went out to water my roses.我出去给我的玫瑰浇水。v. 流口水 The delicious dishes you cooked made my mouth water.你做的美味的菜让我流口水了。2. nuisance n. 讨厌的东西或人【口语】What a nuisance! 真讨厌!Commit no nuisance 此处不准大 小便/不得在此倒垃圾!3. terribly adv.非常，很 I feel terribly ill today. 今天我感觉很不舒服。terrible adj. 可怕的，糟糕的4. mean (meant meant) v. 意味着，意思是 What do you mean? 你的意思是?I mean we need to water the garden. 我想说是我们得给花园浇水了。mean adj. 吝啬的，小气的 His uncle is a mean guy. 他的叔叔是个小气鬼。5. dry adj. 干的，干燥的 a dry well 一口枯井 hair dryer/hair drier 吹风筒/干发器wet adj.湿的，湿润的dry v.擦干 dry ones eyes/tears 擦干眼泪6. surprise n.惊奇、意外的事 What a surprise! 真意外!surprise v. 使.惊奇 Your sudden coming surprised all of us. 你的突然到来让我们所有人都吃了一惊。(二)语法讲解【情态动词must, have to, need】1.must 必须(主观上觉得必须)I must study hard.(我得好好学习。这种感觉是自发的)have to 不得不，一定 (客观上觉得必须)I have to study hard. (我不得不好好学习。也许是父母 要求的)need to 需要. (客观上有这种需求)2.在问句中的使用-Must I arrive on time? -Yes, you must./No,you neednt.-Do I have to arrive on time? -Yes, you have to./No, you dont have to.由must引导的疑问句，肯定回答时，用must，否定句则用neednt。句子中有have to的提问，肯定回答，用have to,否定回答用否定词+have to.