必修4 Module3 Grammar1

• Supposing it rains, shall we continue the sports meeting? • 倘若下雨,我们的运动会还要继续举行吗? • Supposing anything should go wrong, what would you do? • 假如出了什么问题,你将怎么做?
provided/providing conj.假如,除非, 以……为条件 provided (that) +从句表 示一种假设条件。
• Provided that you promise not to tell anyone, I'll explain the secret • 只要你保证不告诉任何人，我就把这个 秘密告诉你。
主将从现 3. 口诀: ___________
条件状语从句：If
②
1. 如果我把玻璃杯扔掉，它就会摔碎。 breaks drop a glass, it ________. If I _______
一般现在时 ，主句也用 2. if 从句用___________ 一般现在时 __________，表示客观事实或习惯。
Adverbial clause of condition
Adverbial clause of condition
由引导词if或unless引导的状语从句叫做条 件状语从句。在英文中，条件是指某一件 事情实现之后（状语从句中的动作），其 它事情（主句中的动作）才能发生，通常 译作“假如”。 If you ask him, he will help you. Unless it rains, the game will be played.
Complete the sentences with whoever, wherever, whenever, or however.
1. __________ Whenever I feel lonely, I think about you. 2. ________ Whoever he is, he is very rude to me. 3. _________ wherever I go, I always meet interesting people. 4. You can invite ________ whoever you like to the party. 5. _________ However late you arrive, I’ll come and meet you. 6. I feel shy __________ whenever she says hello to me. whenever I switch on radio. 7. I hear that song __________ 8. ___________ However much I study, I find these exercises difficult.
don’t leave now
won’t catch
Unless you leave now
won’t catch
主现从现 3. 口诀: ___________
Unless 如果不，除非

条件状语从句: unless 从句遵循if 从句 主将从现 和 主现从现 的情况。
要领:unless = if …not
Unless = If…not
1. 如果明天不下雨，我们就去远足。 If it __________________, doesn’t rain tomorrow we will go hiking. =We will go hiking __________________ unless it rains tomorrow. 2. 如果你不把肉存放在冰箱里，它就会变坏。 If you__________________ don’t keep the meat in the fridge, it _________. goes bad = _______________________in the fridge, it Unless you keep the meat _________.
谢谢观赏
条件状语从句：If
Hale Waihona Puke ①1. 如果他努力学习，他将会通过考试。 studies hard, he ________ will pass If he _______ the exam.
一般现在时 ，主句用 2. if 从句用___________
一般将来时 ，用来描述将来的情况。 __________
其它引导词引导的条件状 语从句：
• on condition(that)... 在…条件下，条件是... • on condition(that)引导的条件从句是主句事 件发生的前提条件或唯一条件。 • You can use my bike on condition that you return it by Friday. • 你可以使用我的自行车，条件是你星期五 以前还。 • 我会来，条件是也邀请她来。 • I'll come on condition (that) she is invited too
语法引导条件状语从句最常用的连 词是if，由if引导的条件状语从句表 示在某种条件下某事很可能发生。 • If he runs, he’ll get there in time. • If I have time tomorrow, I'll go to see the film with you. • If you look it up in the dictionary, you'll find out.
goes bad
Unless = If…not
3. 除非天下雨，他通常是走路去上学。 goes to school He usually _____________ on foot if it ___________. doesn’t rain he usually _____________ =_____________, goes to school on foot. it rains Unless 4. 如果你现在不走，你就赶不上火车了。 If you ________________, you ___________ the train. = ___________________, you ___________ the train.
引导条件状语从句的常用引导词：
if, unless, as/so long as, once, in case, on condition that, supposing (that), providing (that), provided (that), given (that) 在条件状语从句中，用一般现在时代替一 般将来时，用一般过去时代替过去将来时。
• You will fail to arrive there in time unless you start earlier. • 如果你不早点动身,你就不能及时赶到那 儿。 • Unless it rains, the game will be played. • 除非下雨,比赛将照常进行。
unless从句的谓语只能用肯定式。
in case 万一，如果
• • • • Take your umbrella in case it rains. 带着你的伞吧，以防下雨。 万一我忘记，请提醒我一下。 In case I forget, please remind me about it.
supposing conj.如果,假如 supposing引导的条件从句表示 一种假设条件。
• • • • 你若不努力就会失败。 You will fail unless you work hard. 如果你不快点你又要迟到了。 You will be late again unless you hurry.
so/as long as只要
• You may borrow my book as long as you keep it clean. • 只要你保持书的清洁，你就可以把我的 书借去。 • 只要我还有一口气，我就会努力。 • I'll work hard as long as I have breath.
Complete the sentences with the correct form of the verbs in brackets.
1. If you _________ take a cake your host _________ will be very pleased. (take, be) gets better, I ________at 2. Unless the weather ________ will stay home. (get, stay) 3. He _______ will go home early if he ___________ doesn’t feel well. (go, not feel) 4. What ______ they ______ shall I ____if do talk about politics? (do, talk) stop (raise, stop) 5. If you ____ _______. raise your hand the taxi will will not say anything unless he ______ asks me. 6. I ____________ (not say, ask)
• 如果明天下雪，我们将堆雪人。 • If it snows tomorrow, we will build a snowman. • 如果你穿上你的衣服，你将不会觉得太 冷。 • If you put on your cloth, you will not feel so cold.