喵咪
Lv 6
喵咪 asked in 社會與文化語言 · 1 decade ago

must have to need to 的差別??

請問must  have to  need to 的差別??那 while 和 when 的差別呢??

2 Answers

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  • 1 decade ago
    Favorite Answer

    must - you use must to indicate that you think it is very important or necessary for something to happen.

    Ex: What you wear should be stylish and clean, and must definitely fit well.

    have to - you use 'have to' when you are saying that something is necessary or required, or must happen. (= must)

    Ex: The pilots had to take emergency action to avoid a disaster.

    need to - if you need to do something, you cannot successfully achieve what you want or live properly without it.

    Ex: I need to make a phone call.

    Clearly, if you are spending more than your income, you'll need to tighten your belt.

    while 和 when 的差別?

    If something happens while / when something else is happening, the two things are happening at the same time.

    二者皆表達過去、現在或未來同時發生的兩件事,為了區別先後而使用的連接詞。

    .....while (後接先前已發生且持續進行的動作) + was / were V-ing

    Ex: My dad came home while we were doing our homework.

    .....when (後接 突然 / 後來 發生的動作)

    Ex: We were doing our homework when Dad came home.

    2006-03-05 00:08:05 補充:

    when & while 僅用過去式舉例,當然也是用現在及未來式(野人獻曝)

    2006-03-11 17:02:04 補充:

    Thanks for the votes from you all.

    Source(s): Collins Lexicon + 我的記憶
  • Anonymous
    1 decade ago

    ..must have to 命令的語氣...

    need to 建議

    while 現在進行式

    when現在式

    Source(s): 自己
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