题目内容
5.Listen!Someoneis ringing(ring) the doorbell.分析 听!有人在按门铃.
解答 答案:is ringing.
根据Listen!Someone--(ring) the doorbell,可知听!有人在按门铃.listen通常用于现在进行时之中,构成是be(am/is/are)+Ving形式,这里主语是someone,是个不定代词,谓语动词用单数形式.故填is ringing.
点评 本题考查用所给单词的适当形式填空,首先要根据语境明确句意,然后再根据相关语法对所给单词在形式上做出正确的变化.
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