不定式、動名詞和分詞作表語的區(qū)別
(1)不定式作表語
1)不定式作表語一般表示具體動作，特別是表示將來的動作。
To do two things at a time is to do neither.--次做兩件事等于未做。
What I would suggest is to start work at once.我的建議是立刻開始干。
2)如果主語是不定式(表示條件)，表語也是不定式(表示結(jié)果)。
To see is to believe.百聞不如一見。
To work means to earn a living.工作就是為了生活。
3)如果主語是以aim，duty，hope，idea，happiness，job，plan，problem，purpose，thing，wish等為中心的名詞醫(yī)學(xué)全在,線gydjdsj.org.cn，或以what引導(dǎo)的名詞性從句，不定式作表語是對主語起補(bǔ)充說明作用。
His wish is to buy a luxurious car in the near future.他的希望是在不遠(yuǎn)的將來買一輛豪華轎車。
The function of Louis Sullivan’s architecture was to provide large uninterrupted floor areas and to allow ample light into the interior.
The most important thing is to negotiate with them about the future of the plant.
(2)動名詞作表語：動名詞作表語，表示抽象的一般性的行為。
Our work is serving the people.我們的工作是為人民服務(wù)。
His hobby is collecting stamps.他的愛好是集郵。
(注)動名詞作表語時與進(jìn)行時態(tài)中的現(xiàn)在分詞形式相同，但其所屬結(jié)構(gòu)迥異，進(jìn)行時態(tài)說明動作是由主語完成的。動名詞做表語，說明主語的性質(zhì)或情況。
People cannot but feel puzzled，for they simply cannot understand how he could have made such a stupid mistake.
His victory in the final was no more convincing than I had expected.
