發(fā)布時間: 2017年05月22日
as 用法詳解
1 用作連詞,表示讓步 ,要用于倒裝句,且倒裝后位于句首的名詞通常不用冠詞 。如:
Child as[though]he was, he did quite well. 他雖是個孩子,但已干得很不錯。
2. 用作關系代詞,主要用法有二。如:
用在such, same, as等之后,引導限制性定語從句。如:
This is thesame watch as I lost. 這塊表跟我丟失的那塊一樣。
Such men as heard of him praised him. 聽說過他的人都贊揚他。
單獨用作關系代詞,引導非限制性定語從句,可放在主句之前 或之后 ,且主從句之間一般要用逗號隔開。如:
He was absent, as is often the case. 他缺席了,這是常有的事。
As was expected, he succeeded at last. 正如我們所料,他終于成功了。
3. 用來表示目的,下面兩種句子結(jié)構(gòu)都可以。如:
仔細寫以便把每句話都寫清楚。
正:Write carefully so as to make every sentence clear.
正:Write so carefully as to make every sentence clear.
4. 在正式文體 中,as后可用倒裝語序表示“…也一樣”這類意思 。如:
He travelled agreat deal, as did most of his friends. 他去過許多地方旅游,他的多數(shù)朋友也是一樣。
He plays the piano, as does his mother. 他會彈鋼琴,他母親也會。
注:用作連詞,表示原因 ,表示時間 。
5. 用于 as if
as though, 意為“仿佛”、“似乎”。兩者一般可通用 。用法上注意幾點:
as if [though] 可引導狀語從句和表語從句,從句謂語根據(jù)語義的要求,可用陳述語氣 或虛擬語氣 。如:
It looks as if it is going to rain. 天似乎要下雨了。
It seems as if you’re right. 似乎你是對的。
He talks asthough he knew everything. 他夸夸其談,好像無所不知。
When apencil is partly in a glass of water, it looks as if it werebroken. 當把一支鉛筆的一部分放在一杯水里時,它看起來好像折斷了似的。
當主句謂語是過去時態(tài)時,從句謂語??捎藐愂稣Z氣。如:
He pausedas though he found a difficulty. 他停了下來,似乎遇到了一個難題。
She felt as if she lost something. 他覺得似乎丟了什么東西。
當從句主語與主句主語一致,且從句謂語中又包括有動詞be時,從句主語及其謂語中的動詞be通??梢允∪?。如:
From time to time heturned round as though searching for someone. 他不時地四下張望,好像在找人。
He opened his mouth as if to speak. 他張開口,好像要說話似的。
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