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  分词短语及其逻辑主语


  分词短语作状语时,一般没有自己的主语,其逻辑主语就是整个句子的主语。但有时分词短语可以有自己的主语,由名词或代词表示,放在分词短语之前,它们之间存在着逻辑上的主谓关系。这种结构在句中用作状语,表示时间、条件、伴随等。如:

  1.The work having been done, they stopped to have a rest.

  2.The class being over, we had a discussion.

  3.There being nobody in the room, please come in and have a chat with me.

  4.Weather permitting, we will go for a picnic this weekend.

  5.It being fine,we went fishing in the lake.

  通过分词短语与其逻辑主语之间的这种关系,我们还要注意如下情况:

  一、分词作状语时,其逻辑主语必须与句子主语一致,否则就不能直接用分词短语作状语,而要用状语从句。如:

  不可说:Watching TV, he came in.

  而应说:While I was watching TV, he came in.

  或者说:(While) Watching TV, I saw him come in.

  二、分词短语有时独立使用,和句中的主语并不发生直接关系,仅起插入语作用。如:

  1.Generally speaking, the weather here is pleasant.

  2.Judging from his accent, he must be from Beijing.

  三、分词作补足语时的逻辑主语,一般情况下,都是其前面的名词或代词,能带分词作补足语的动词为数不多,常见的有:see,hear,watch,keep,get,have等。如:

  1.I saw him crossing the street.

  2.Don't worry, I have car waiting at the gate.

  3.I heard her singing in her room.

  四、分词还有一个值得注意的结构:with+名词(或代词宾格)+分词短语。它在句中常用作伴随状语。如:

  1.The boy stood there with his hand still raised.

  2.With modern industry developing quickly, more and more waste is produced.

  注意:这种结构中的分词也可用形容词、副词、名词或介词短语代替。