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there be句型中,be動(dòng)詞的是用單數(shù)is還是復(fù)數(shù)are,取決于后面的實(shí)義主語(yǔ)是單數(shù)還是復(fù)數(shù),例如上述句型中的實(shí)義主語(yǔ)是pen ,be動(dòng)詞用單數(shù)is;當(dāng)實(shí)義主語(yǔ)是pens的時(shí)候,be動(dòng)詞用復(fù)數(shù)are。
當(dāng)實(shí)義主語(yǔ)是一個(gè)并列結(jié)構(gòu)時(shí),be動(dòng)詞的單復(fù)數(shù)取決于第一個(gè)并列成分,也就是說(shuō)遵循就近原則。 例如:There is a pen and two pencils on the desk. There are two pencils and a pen on the desk.
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