题目内容
11.他们已经学了5年英语了.Five yearshas passed since they beganto learn English.
分析 has passed,to learn.
解答 答案:has passed,to learn.句中since表示自从,引导的是时间状语从句,开始做某事用begin to do sth,学习learn,故to learn.主句是说五年已经过去了,用现在完成时have/has+过去分词,时间过去用pass,主语是时间five years谓语动词用单数has,故答案是has passed,to learn.
点评 since作连词,指"时间",表示"自…以来".Since引导时间状语从句,表示主句的动作,从过去的某一点时间持续到现在,从名时态常用一般过去时,主句的时态一般用现在完成时.如:He has not written to me since he graduated from high school.自从他中学毕业以来,一直没有写信给我.
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