Chin asked in 社會及文化語言 · 8 years ago

請英文高手指教when and if!

請英文高手指教一下為何括號內的是if或when而不是if或when?

1.(When) water goes down a plughole on the equator, it swirls in neither

direction.

2.(If )you put a match in a basin of water and the pull the plug, it doesn't spin at

all.

3.Scientists have done lots of experiments to test this and the conclusion is that

(if) you stand about twenty metres from the equator, the water starts to spin.

4.(If ) I close my eyes, I can still see the smile on her face!

5.A giraffe uses its legs as weapons (when) it defends itself against an attack

from a lion.

6.(If) someone is scared of animals, they have zoophobia.

7.(When) you sneeze, you close your eyes.

3 Answers

Rating
  • 呆子
    Lv 7
    8 years ago
    Favorite Answer

    when :二個動作(事件)同時發生使用

    (When) you sneeze, you close your eyes.

    當你打噴嚏你會同時閉上雙眼

    (when) I close my eyes, I can still see the smile on her face!

    當我閉上眼睛,我仍然可看到你臉上笑容(未閉上眼時,你就在笑)

    (if) I close my eyes, I can still see the smile on her face!

    假如我閉上眼睛,我可回味你臉上笑容

    if :若一個動作(事件)發生時,則另一個動作(事件)才會發生。

    (If) someone is scared of animals, they have zoophobia.

    假如有人害怕動物,他就是得了動物恐怖症(不是每個人都害怕動物)

    summary:有時都可使用但意思不一樣,when 是單向雙行道而if是叉路只可選擇一條路---------

    2012-12-27 20:39:39 補充:

    所以一個事實用when 或 if 皆可,若是有選擇性用if------

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  • Huevos
    Lv 6
    8 years ago

    if - "如當",帶有"如果"以及"不確定"的意思, 並不確定的時候使用

    when - "當",當確定時使用 *conditional statement

    #如果句子是講一個fact的話,if跟when可以互換使用

    參考: https://e-gmat.com/blogs/?p=169

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  • 8 years ago

    全部是when...

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