考點(diǎn)3、集合名詞的數(shù)
    一般地說，集合名詞只以單數(shù)形式出現(xiàn)。常見的有：family，police，cattle，team，people，government，class，group，audience（觀眾），public（公眾），crew（全體船員）等。當(dāng)這些名詞作主語時，若表示一個整體時，謂語動詞用單數(shù)形式；若表示集體的每一個成員時，謂語動詞用復(fù)數(shù)形式。
    His family is a big family./ The whole family are watching TV now.
    The government welcomes the proposal.（政府歡迎該建議。）
    The government are discussing the proposal.（政府官員正在討論該建議。）
    注意：
    police和cattle后面的謂語動詞總是用復(fù)數(shù)形式
    Many cattle are kept on the farm.
    Several hundred police are on duty.
    考點(diǎn)4、of+抽象數(shù)=相應(yīng)的形容詞
    of+geat+抽象名詞=very+相應(yīng)的形容詞
    of+no+抽象名詞=not+相應(yīng)的形容詞（or -less，un-）
    這樣的抽象名詞主要有：importance，value，use，help
    The dictionary is of great use/help.=The dictionary is very useful/helpful.
    The meeting is of great importance.=The meeting is very important.
    Ginseng is of great medicine value. （西洋參具有很高的藥用價值。）
    Your advice is of great value to us=Your advice is very valuable to us.
    His suggestion is of no use=His suggestion is not useful.
    That program is of great interest to the children.
    =That program is very interesting to the children.
    但是，of+color/age/height/width常用來表示具有同樣的顏色、年齡、高度、寬度等等。
    These two jackets are of the same color.（這兩件夾克衫顏色一樣。）
    We‘re of the same age.（我們年齡一樣大。）