idea既是可數(shù)名詞（C）,也是不可數(shù)名詞（U）,不同意思有不同的屬性.
1、主意;打算;計(jì)劃[C][(+of)][+to-v][+that]
He hit upon the good idea of spending the weekend in the nearby holiday camp.
他想到去附近度假營(yíng)過(guò)周末這個(gè)好主意.
2、構(gòu)想;概念[C][U][(+of)]
Have you any idea of what he is up to?
你知道他想干什么嗎?
3、了解,明白[C][(+of)][+wh-]
I have no idea what to do.
我不知道該怎么辦.
4、臆測(cè);推量[C][+(that)]
I've an idea that he'll soon quit the job.
我猜想他不久就要辭掉這工作.
5、意見(jiàn),見(jiàn)解;信念[(+about/on)][+that]
That at least is my idea about friendship.
至少那是我對(duì)友誼的理解.
6、思想;觀念[C][U]
He destroyed feudal ideas in literature.
他摧毀了文學(xué)中的封建思想.