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陷阱2  用錯條件狀語從句的時態

當主句為將來時態或具有將來意時，條件狀語從句通常要用一般現在時表示將來意義，而不能直接使用將來時態。如：

如果明天下雨我們就呆在家里。

誤：We’ll stay at home if it will rain tomorrow.

正：We’ll stay at home if it rains tomorrow. (http://ask.yygrammar.com/)

注意，有時也可見到 if you will 這樣的說法，但那不是將來時態，而是表示意愿或委婉的請求(此處的 will是情態動詞)。如：

If you will follow me, I’ll show you the way. 請跟我來，我給你指路。

【強化訓練】

選擇最佳答案填空：

1. —Look! Here comes our school bus.

—No hurry. Don’t get on it ________ it has stopped.

A. until                  B. after                   C. since                    D. when

2. ________ the story is short and there are no new words in it, it is difficult to understand.

A. But                    B. Though             C. And                   D.  For

3. The red suitcase is expensive ________ it’s made of leather.

A. when                B. if                         C. because           D. though

4. He met many problems ________ he was going over his lessons.

A. before              B. as soon as       C. since                 D. while

5. The little boy ate a big meal ________ he said he wasn’t hungry.

A. if                        B. though              C. because           D. as  

6. —What is our head teacher like, do you know?

—Oh, he is very kind ________ he looks very serious.

A. because          B. though              C. if                        D. when

7. —What do you think of her dress?(http://ask.yygrammar.com/)

—I think it still looks quite fashionable on her ________ it is a style of many years ago.

A. though             B. or                       C. so                      D. because

8. ________ hamburgers are junk food, many children like them.

A. If                        B. Unless              C. Because           D. Although

9. —Tommy, do you know if Frank ________ to the zoo this Sunday if it ________?

—Sorry, I have no idea.

A. will go; is fine                                 B. goes; is fine

C. will go; is going to be fine            D. goes; will be fine

10. I will call you as soon as I ________ the ticket to the football match.

A. will get             B. get                     C. got                     D. am getting

11. —David, turn off the TV ________ no one is watching it.

—But it ________ off already！The music is from the radio.

A. so that, has been turned              B. when, has turned

C. if, has been turned                                                       D. because, has turned

12. —You will fail the exam ________ you don’t work hard.

—OK, I’ll try my best. (m.52ysedu.com)

A. and                   B. though              C. but                     D. if

13. Tom knew nothing about it ________ his sister told him.

A. since                B. if                         C. until                   D. when

14. I can’t still understand the passage ________ there are few new words in it.

A. so                      B. because           C. if                        D. though

15. She has studied in this school ________ she was seven years old.

A. since                B. if                         C. until                   D. after

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