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If I won the lottery, I would buy a yacht. 如果我中了彩票,我會買一艘遊艇。
If I had a better salary, I could travel more. 如果我有更好的薪水,我可以旅行更多。
If I were you, I might wait before making a decision. 如果我是你,我可能在做決定前等待下。
If it weren’t for his help, I might be dead now. 如果不是他的幫助,我現在可能已經死了。


If 子句和主要子句

我們用 if + 過去式,來表示一種假想中的現在或未來的狀況(雖然動詞是過去式,但時間是表示現在或未來)。而我們用 would + 不定詞來表示這個假想情況的結果。

If I had a swimming pool in my yard, I’d go every day. 如果我的院子裡有一個游泳池,我會每天都去。
Would you call him if you got his phone number? 如果你知道他的電話號碼,你會打電話給他嗎?


當 if 子句在前面的時候,我們通常會在if子句後面加個逗號;當主要子句在前面、if子句在後面的時候,我們通常不加逗號。

If you came to the party, you’d dance a lot.
You’d dance a lot if you came to the party.

句中 would 的用法

would/wouldn’t 在所有的人稱中都是一樣的用法。

I/you/he/she/it/we/they would/wouldn’t do that if it was possible. 

縮寫的方式: wouldn’twould not,‘dwould

I’d never pass my test if you failed to bring my books. 如果你不帶我的書,我永遠不會通過我的考試。
I wouldn’t pass my test if you failed to bring my books. 如果你不帶我的書,我就不會通過考試。

句中 could 的用法

在主要子句中,我們通常可以用 could + 不定詞,來代替 would +不定詞

If you wrote the book, you could give me a sign. 如果你寫這本書,你可以給我一個簽名。

要用 was 或 were?

在第二條件句中,我們可以用 if I/he/she/it were(較為正式)來代替 if I/he/she/it was。

If he were/was a good singer, he would win the contest. 如果他是/是一個好歌手,他會贏得比賽。

但是當我們用 if I were you這樣的句型來表示給予某人建議時我們用 were(請注意,不是 was)。

If I were you, I would break up with him.
I wouldn’t go to that restaurant if I were you.

第一條件句 VS 第二條件句



If I don’t have a doctor’s appointment later in the afternoon, I’ll have to go shopping with you. (這是有可能的,也許我明天沒有和醫生掛到號,所以可以和你一起去逛街。)

If I didn’t have a doctor’s appointment later in the afternoon, I’d have shopped with you. (這是假設性的,因為我明天已經向醫生掛號了,所以不可能和你一起去逛街。)

第二條件句 – 練習題

1. You wouldn't get a speeding ticket if you more slowly.

2. If he more experience, he'd work hard.

3. Where would you go if you a better place for vacation?

4. A lot of health problems could be prevented if people better.

5. If I had a mobile phone , I someone for help.

6. She would be relaxing at home if she by herself.

7. If you borrow money from me, you it back with interest.

8. If it didn't rain, I to school.

9. I'd call you even after 10 p.m. every day if my parents me to use my phone at night.

10. I wouldn't watch that movie if I you.




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