4.Our notebook computerweighs 5pounds and costs about $2,000.(weigh)

分析 我們的筆記本電腦重5磅,花費(fèi)約2000美元.

解答 答案:weighs 根據(jù)"costs"可知與之相并列的and之前的動(dòng)作也應(yīng)該是一般現(xiàn)在時(shí),根據(jù)主語(yǔ)"our notebook computer"(我們的筆記本電腦),可知主語(yǔ)為第三人稱(chēng)單數(shù),其后的謂語(yǔ)動(dòng)詞weigh要用第三人稱(chēng)單數(shù)形式weighs,故答案為weighs

點(diǎn)評(píng) 本題考查謂語(yǔ)動(dòng)詞的形式,謂語(yǔ)動(dòng)詞的形式取決于主語(yǔ)人稱(chēng)與時(shí)態(tài),首先要根據(jù)并列成分判斷出時(shí)態(tài),其次要根據(jù)人稱(chēng)來(lái)寫(xiě)出動(dòng)詞的正確形式.

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