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。
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