It doesn’t matter _____you pay by cash or credit card in this store.
A.whetherB.howC.whatD.why
A

試題分析:這里it是形式主語(yǔ),whether引導(dǎo)的是真正的主語(yǔ)從句。句意:是用現(xiàn)金還是刷卡付賬都沒(méi)有關(guān)系。故選A。
點(diǎn)評(píng):本題難度適中。在句中作主語(yǔ)的名詞性從句稱為主語(yǔ)從句, 主語(yǔ)從句所對(duì)應(yīng)的謂語(yǔ)動(dòng)詞通常用第三人稱單數(shù)的形式。為了整個(gè)句子的平衡, 主語(yǔ)從句經(jīng)常后置, 并用it充當(dāng)形式主語(yǔ)(此時(shí), that引導(dǎo)的主語(yǔ)從句若不放在句首, 可以省略引導(dǎo)詞that)。it作形式主語(yǔ)代替主語(yǔ)從句主要是為了平衡句子結(jié)構(gòu), 主語(yǔ)從句的連接詞沒(méi)有變化。
即學(xué)即練:____ we’ll go camping tomorrow depends on the weather.
A. If    B. Whether     C. That     D. Where
解析:B。下劃線處的引導(dǎo)詞之后接了一個(gè)完整的陳述句, 但整個(gè)主語(yǔ)從句不是客觀陳述某種情況而是要表示“是否”的意思, 應(yīng)選用引導(dǎo)詞whether。注意: 表示“是否”的名詞性從句的引導(dǎo)詞if不能用于引導(dǎo)主語(yǔ)從句。
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