Our math teacher in our school for 20years and he here when he was 23years old．( )A．has taught.has comeB．taught.comesC．taught.cameD．has taught.came 题目和参考答案——青夏教育精英家教网—

题目内容

14．Our math teacher ______ in our school for 20years and he _____ here when he was 23years old．（　　）

	A．	has taught，has come		B．	taught，comes
	C．	taught，came		D．	has taught，came

分析我们的数学老师在我们学校已经教了20年，当他23岁时就来这里了．

解答答案：D 此题考查句子的时态． for 20 years是现在完成时的时间标志，第一个空用现在完成时，结构式：have/has+过去分词；when he was 23 years old．是时间状语从句，表示过去的时间，故第二个空用一般过去时．故选D

点评本题主要是从他们各自的时间标志入手分别分析所该运用的时态．然后结合所给选项加以排除即可．

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