for的用法
for有很多種用法:
1.表示“當(dāng)作、作為”.如:
I like some bread and milk for breakfast.我喜歡把面包和牛奶作為早餐.
What will we have for supper?我們晚餐吃什么?
2.表示理由或原因,意為“因?yàn)椤⒂捎凇?如:
Thank you for helping me with my English.謝謝你幫我學(xué)習(xí)英語(yǔ).
Thank you for your last letter.謝謝你上次的來(lái)信.
Thank you for teaching us so well.感謝你如此盡心地教我們.
3.表示動(dòng)作的對(duì)象或接受者,意為“給……”、“對(duì)…… (而言)”.如:
Let me pick it up for you.讓我為你撿起來(lái).
Watching TV too much is bad for your health.看電視太多有害于你的健康.
4.表示時(shí)間、距離,意為“計(jì)、達(dá)”.如:
I usually do the running for an hour in the morning.我早晨通常跑步一小時(shí).
We will stay there for two days.我們將在那里逗留兩天.
5.表示去向、目的,意為“向、往、取、買”等.如:
Let’s go for a walk.我們出去散步吧.
I came here for my schoolbag.我來(lái)這兒取書包.
I paid twenty yuan for the dictionary.我花了20元買這本詞典.
6.表示所屬關(guān)系或用途,意為“為、適于……的”.如:
It’s time for school.到上學(xué)的時(shí)間了.
Here is a letter for you.這兒有你的一封信.
7.表示“支持、贊成”.如:
Are you for this plan or against it?你是支持還是反對(duì)這個(gè)計(jì)劃?
8.用于一些固定搭配中.如:
Who are you waiting for?你在等誰(shuí)?
For example,Mr Green is a kind teacher.比如,格林先生是一位心地善良的老師.
because, since, as, for的用法區(qū)別
四者均可用來(lái)表示原因,區(qū)別如下:
(1) 關(guān)于 because:語(yǔ)氣最強(qiáng),表示直接原因,可用于回答 why 提出的問(wèn)題、引導(dǎo)表語(yǔ)從句、用于強(qiáng)調(diào)句等,而其余三者均不行:
“Why didn’t he come?” “Because he was ill.” “他為什么沒來(lái)?”“因?yàn)樗×。?/p>
My stomach hurts because I have eaten too many apples. 我肚子痛,因?yàn)樘O果吃得太多。
That’s because you can’t appreciate music. 這是因?yàn)槟悴荒苄蕾p音樂。
It is because he is honest that I like him. 是因?yàn)樗\(chéng)實(shí)我才喜歡他。
(2) 關(guān)于 since 與 as:
a. 兩者所表示的原因都是人們已知的,即對(duì)已知事實(shí)提供理由,而不是表示直接原因。since 比 as 語(yǔ)氣稍強(qiáng),且比 as 略為正式,它們引導(dǎo)的從句通常放在主句之前,有時(shí)也放在主句之后:
As you weren’t there, I left a message. 由于你不在那兒,我留了個(gè)口信。
Since you are wrong, you should apologize. 你既然錯(cuò)了,就應(yīng)該道歉。
b. since 可用于省略句,而其他三者不行:
Since so, I have nothing to say. 既然如此,我無(wú)話可說(shuō)。
(3) 關(guān)于 for:是并列連詞(其余三者為從屬連詞),它有時(shí)可表示因果關(guān)系(通常要放在主句之后,且可與 because 換用);有時(shí)不表示因果關(guān)系,而是對(duì)前面分句內(nèi)容的解釋或推斷(也要放在主句之后,但不能與because 換用)。比較:
The ground is wet, for (=because) it rained last night. 地面是濕的,因?yàn)樽蛲硐逻^(guò)雨。
It must have rained last night, for the ground is wet this morning. 昨晚一定下過(guò)雨,你看今天早上地面是濕的。 (此句不能用 because 代 for)
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