假設語句.

Presentation on theme: "假設語句."— Presentation transcript:

1 假設語句

2 假設法常用“IF”(如果)來表示, “IF”常使用於與事實相反的情況
ex: (a)實際狀況---I don’t have money. 使用假設---If I had money, I could buy a car. (b)實際狀況---The weather was not nice yesterday. 使用假設---If the weather had been nice yesterday,I would have gone to the park.

3 句型1. 與現在事實相反 were should If+S , S+ would +V 過去式動詞 could might

4 EX: 1.If I had money, I would help you. 如果我有錢,我會幫助你. 我現在沒有錢(與現在事實相反)
2.If I were Minister of Education now, I would change certain things. 如果我是教育部長,我要改革一些事情. 我現在不是(與現在事實相反)

5 3.If Kate were here, she would help us. 如果Kate在的話,她就會幫我們.
could=would be able to 表示可能的機會

6 牛刀小試: 1.If I ______ (know) how to swim, I _______ (go) to the beach with you. 提示: I don’t know how to swim. Knew, would go 2.If it ______ (be) Saturday, I ______ (go) to the beach. 提示: It is not Saturday. were, could go

7 句型2. 與過去事實相反 should would If+S+had+p.p, S+ could +have+p.p might

8 EX: 1.If I had driven a little slower, I would not have run into that truck. 如果我車子開慢點,就不會撞上那卡車了. 事實上事情已經發生(與過去事實相反) 2.If he had taken my advice, he might not have died. 他如果聽我的勸,也許不會死. 他並未聽勸,已經死亡(與過去事實相反)

9 牛刀小試: 1.If Mary ______ (come) to my party last week, she______ (meet) my boyfriend. 提示:She did not come to my party. had come, could have met 2.If it ______ (be,not)cold yesterday, I ______ (go) swimming. 提示:It was cold yesterday. had not been, would have gone

10 句型3.與未來事實相反 should would If+S+were to V…,S+ could +V might
-----表不可能之假設

11 EX: 1.If I were to live to be 150 years old, I
still could not read through all the books. 假使我活到150歲,也無法讀完這些書. 我不可能活到150(與未來相反的假設) 2.If you were to die tomorrow, what would you most wish to do today? 萬一你明天就死,你今天最想做什麼事? 你不會明天就死(與未來相反)

12 牛刀小試: 1.If the sun ______ (rise) from the west, I______ (marry) you.
提示: The sun never rises from the west. were to rise, would marry 2.If I ______ (win) a million dollars, I______(buy) the BMW. 提示: I can never win a million dollars. were to win, would buy

13 綜合練習: 一.改正下列各句的錯誤: 1. If John got up earlier this morning, he would not have been late for school. If John had got up earlier this morning, 2. If he was to die tomorrow, he would be together with his parents today. If he were to die tomorrow, 3. If he is not busy today, he would com to see us. If he were busy today,

14 1.What would you have done yesterday if you had not come to class?
二.用完整的句子回答問題: 1.What would you have done yesterday if you had not come to class? 2.What would you do if you were to fly like a bird? 3.Where would you be right now if you were not in class?