外研版必修四Module3grammar概要.ppt

Adverbial clause of condition Look at the sentences from the passage. 1 If you say the word “communication”, most people think of words and sentences. We use “learned” body language when we are introduced to strangers. Now tick the true statements 1 The sentences from the passage … Describe common situations Describe impossible situations Use if or when to introduce the situation Explain the result of the situation in the other part of the sentence Use the present simple tense in both parts of the sentence √ √ √ √ Match the two parts of these sentences. 3 When you meet someone for the first time If you say goodbye to someone When you show someone the way If you nod your head When you enter a house If you shake your head A you usually mean no B you usually point C you often wave to them D you don’t take your shoes off E you shake hands with them. F you usually mean yes. 3.Adverbial Clauses of Condition I. if 1)If he had worked harder, he would have passed the exam. 2)If you work harder, you will succeed. Work harder, and you will succeed. Work harder,or you won’t succeed. Working harder,you will succeed. II. unless 1)We can’t write to Mary unless she tells us her address. We can’t write to Mary if she doesn’t tell us her address. *III. as long as(只要 ) 1)I will never give up learning as long as I live. 2)You may borrow the book as long as you keep it clean. *IV. on condition that（条件是） We’ll let you use the room on condition that you keep it tidy. *V. in case(万一） You’d better take your raincoat with you in case it rains. 种 类 从属 连句 例 句 说 明 条 件 状 语 从 句 if unless as/so long as in case so far as Difficulties are nothing if we are not afraid of them. We shall go there tomorrow unless it rains. = We shall go there tomorrow if it doesn’t rain. So/As long as you work hard, you will succeed. In case I forget, please remind me about it . So far as I know, the book will be published next month. unless从句的谓语只能用肯定式。unless和if…no