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關(guān)閉窗口 七、考查there be句式中的主謂一致
在there be句式中，動(dòng)詞be不僅有時(shí)態(tài)上的變化，而且有單復(fù)數(shù)的變化：確定其時(shí)態(tài)的方法是看句子意思和句中的時(shí)態(tài)狀語或其他相關(guān)時(shí)態(tài)；確定其單復(fù)數(shù)的方法是看與動(dòng)詞be最靠近的名詞是單數(shù)還是復(fù)數(shù)。
【例1】Look, there ________ many students on the playground at the moment. (浙江衢州中考題)
A. is B. are C. was D. were
解析：there be句式中的be與其后的所接名詞（其實(shí)是用作主語）保持一致，故可排除A和C；再根據(jù)句中的look和at the moment可知，句子應(yīng)用一般現(xiàn)在時(shí)，即答案選B。
【例2】—Why are you late, Jim?
—Because there ________ a lot of traffic when I came here. (江蘇泰州中考題)
A. is B. are C. was D. were
解析：因traffic（交通）為不可數(shù)名詞，故此處的there be句式中的be用單數(shù)is；再根據(jù)when I came here中的一般過去時(shí)可知，句子說的是過去的情況，故選C。
八、考查一段時(shí)間或一筆錢作主語時(shí)的主謂一致
當(dāng)一段時(shí)間（如ten years）和一筆錢（如100 dollars）用作主語時(shí)，若是將其視為一個(gè)整體看待，其后的謂語動(dòng)詞應(yīng)用單數(shù)。
【例1】— How soon can you finish this job?
— Two days ________ enough for me to finish the work. I need a week. (四川自貢中考題)
A. isn’t B. aren’t C. is D. are
解析：雖然句子主語two days為復(fù)數(shù)形式，但從句意來看，它在此是被作為一個(gè)整體看待的，故謂語動(dòng)詞應(yīng)用單數(shù)，即可排除B和D；再根據(jù)句中的I need a week（我需要一周）可知，“兩天”肯定是不夠，故答案選A。
【例2】—How much is the pair of shoes?
—Twenty dollars ________ enough.(四川廣安中考題)
A. is B. are C. am D. have
解析：根據(jù)句意，twenty dollars在此被看成一個(gè)整體，表示單數(shù)概念，故用is，即答案為A。
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