非限定动词及其短语，从五个方面进行剖析，让你了解。

  1. 当主语:不定动词和动名词都可当句子的主语，取代名词和代名词。

    (1)To swim in a warm day is joyful.

    (2)Swimming makes us hale and hearty.

  2. 当补足语:可当主语的句子成分也可当补足语。

    (1)A good government's desire is serving the peopel.

    (2)What is difficult is to hoodwink the public indefinitely.

    同样的，现在分词与过去分词也可充当接系动词的补足语。

    (3) The witness's evidence is quite convincing.

    (4)At long last, John was fully convinced.

  3. 当宾语:不定动词和动名词都可充当及物动词的宾语。

    (1)The baby wanted to drink milk.

    (2)Janet suddenly stopped talking.

    它们也可以成为介词的宾语，但除了"except,but,about,than"之外，介词的宾语多数是动名词。

    (3)I am tired of repeating the same point.

    (4)Most of us desired nothing except to succeed.

    (5)That weak old man is about to die.

  4. 当名词修饰语

    (1)Don't disturb the sleeping dog.（现在分词）

    (2)Can you remove the damaged machine?(过去分词)

    (3)That is the only thing to do.(不定式动词)

    (4)The sailors came in a fishing boat.（动名词）

  5. 当动词修饰语

    (1)Walking along the road,he came across a friend.（现在分词短语）

    (2)Extremely frightened,the picnickers fled.（过去分词短语）

    (3）The athlete stopped to take a rest?(不定式动词短语)

    (4)Peter came running.（动名词）