题目内容
10.My sisterhas been (be) a singer since she left the school.分析 我的姐姐/妹妹从离开学校后就成为一位歌手.
解答 答案:has been
依照题干中的"since"自从的介词可以得知他的姐姐/妹妹自从离开学校后已经成为歌手,且持续进行当中,换句话说,成为歌手这件事是从以前持续到现在,且以后可能会继续当歌手,因此要用现在完成时,其构成为has/have+动词的过去分词;.依照提示的动词"be",其过去分词为been;又"my sister"为第三人称单数,原本的助动词"have"要做三单转换成"has".故答案为"has been".
点评 本题考查同学对于现在完成式的理解,以及同学必须熟记动词的三态变化,尤其是不规则变化特别需要同学熟记.
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