主謂一致是英語語法的一個(gè)重要的版塊，今天，小編為同學(xué)們準(zhǔn)備了相關(guān)的主謂一致語法體系下的謂語動(dòng)詞用單數(shù)的清況，一起來看看吧！

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1）當(dāng)名詞詞組中心詞為表示金錢、時(shí)間、度量、距離、價(jià)格等復(fù)數(shù)名詞時(shí)，把這些復(fù)數(shù)名詞看作一個(gè)整體。謂語動(dòng)詞采用單數(shù)形式。

Twenty-five dollars is too much to pay for that shirt．

Fifty minutes isn’t enough to finish this test．

Ten miles seems like a long walk to me．

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2） 以“-s”結(jié)尾的書刊名、國名、組織名、游戲名、運(yùn)動(dòng)名，謂語動(dòng)詞用單數(shù)以-ics結(jié)尾的名詞指一門學(xué)科時(shí)，常用單數(shù)謂語動(dòng)詞形式。當(dāng)這些名詞表示實(shí)際內(nèi)容時(shí)，謂語動(dòng)詞則用復(fù)數(shù)形式。

這類單詞有： ?economics經(jīng)濟(jì)學(xué) ???????electronics電子學(xué)

????????????????????? physics物理學(xué) ?????????politics政治學(xué)

????????????????????? mathematics數(shù)學(xué) ???????statistics統(tǒng)計(jì)學(xué)

Roots ?was a novel about a slave family．

His politics were a matter of great concern to his friend．

Politics is his favorite subject．

Statistics show that approximately 40 percent of all marriages in the US end in divorce．

Statistics is a subject that is difficult to learn．

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3）有些表示某類別的總稱的集合名詞，如：machinery(機(jī)械)，clothing(衣服)，luggage(行李)，furniture(家具)，equipment(設(shè)備)，jewelry(珠寶)等作主語時(shí)，謂語動(dòng)詞常用單數(shù)。如：

My luggage was sent by air．

The equipment of our factory is all imported from Britain.

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4） 不定式、現(xiàn)在分詞和從句作主語，謂語動(dòng)詞通常用單數(shù)：

Playing with fire is dangerous．

注意： 若用and連接兩個(gè)動(dòng)名詞、不定式短語或主語從句，表示兩個(gè)不同的概念，則謂語動(dòng)詞用復(fù)數(shù)形式。若表示同一概念，則謂語動(dòng)詞用單數(shù)形式

Early to rise and early to bed is a good habit．

When and where the building will be built hasn’t been decided．

主語從句要根據(jù)從句表達(dá)的意思而定

What she said is correct． ??????What he gave me are five English books．

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