题目内容
8．格林先生来中国五年了．Mr Green has been in China for five years/since five years ago．．分析 Mr Green has been in China for five years/since five years ago．
解答 答案：Mr Green has been in China for five years/since five years ago．
根据汉语意思"格林先生来中国五年了"可知是指从过去某个时间开始一直延续到现在的一种状态，故此句应该用现在完成时；其构成是：have/has+过去分词；因为此句和时间段"五年"连用即for five years或者since five years ago，所以谓语动词应该用延续性动词，所以不能用终止性动词come，可以用表状态的be in（China）来表达；主语为Mr Green 为三单，所以助动词用has，be的过去分词为been，故此句可以完整地表达为：Mr Green has been in China for five years/since five years ago．
点评 此题考查现在完成时的运用．做题时根据语境选择出正确的时态，结合构成做出正确的句子．本题要特别注意谓语动词的使用，注意终止性动词和延续性动词的互换．
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