不定式、分词、动名词作定语时的比较
A．作前置定语
副科长现在分词、过去分词、动名词可以作前置定语，而不定式不能作前置定语。如：
① a developing country , a developed country ; boiling water，boiled water ;
②building materials , a swimming pool ; the sleeping boy , the coming
new year 。
辨异的方法很简单：
①现在分词具有主动、进行的特点，而过去分词则具有被动、完成的特点。例如：4月22
a developing country=a country which is developing (发展中国家 )； boiling water=water which is boiling(正在滚开的水 ) ;
a developed country=a country which has developed（发达国家）；
boiled water=water which has been boiled(已滚开过的水)。
②现在分词和动名词同形，但作前置定语时，动名词表示所修饰的名词的用途，例如：building materials = materials for building;
a swimming pool = a pool for swimming ；
而现在分词作前置定语时，表示所修饰的名词正在进行的动作，两者是逻辑上的主谓关系。
例如：the sleeping boy=the boy who is sleeping ;
the coming new year=the new year that is coming 。
怎么设置dns
B．作后置定语伟大英语
慢四步不定式、现在分词、过去分词都能作作后置定语，而动名词不作后置定语。
先看例句：
① The problem to be discusd at the meeting is very important.
② The problem discusd discusd at the meeting is very important.
③ The problem being discusd at the meeting is very important.
辨析比较：上面例句分别用不定式、现在分词、过去分词作后置定语，是因
为它们存在不同的情况：不定式作定语，表示动作正要进行（未发生）；现在分
词作定语，表示动作正在进行（正在发生）；过去分词作定语，表示动作已完成（已发生）。据此，我们可以把上面的例句还原为定语从句作定语的句子，这样学生就更容易理解：
①The problem to be discusd at the meeting is very important.
房地产估价规范
= The problem ( which is ) to be discusd at the meeting is very
important.
②The problem discusd at the meeting is very important.
= The problem (which was ) discusd at the meeting is very important.
③The problem being discusd at the meeting is very important.
= The problem (which is ) being discusd at the meeting is very Important.
动名词的复合结构有四种形式：
节奏欢快的歌曲①形容词性物主代词＋动名词；
②名词's＋动名词；
③代词宾格＋动名词；
④名词＋动名词。
成语谜语
