题目内容
10.His uncle,a famous professor,is said _____ his teaching career in Australia before he worked in Beijing University for over 20years.( )A. | to start | B. | to have started | ||
C. | to be startng | D. | to have been starting |
分析 他的叔叔--一位著名的大学教授,据说在北京大学工作长达20年之久之前,已经在澳大利亚开始了他的教育生涯.
解答 答案:B
解析:根据be said to do sth 这一结构可知A选项意为"据说要开始(动作未发生)",B选项意为"据说已经开始(动作已经发生,且结束)",C选项意为"据说正在开始",D选项意为"据说一直在开始(动作还在进行)".根据后面的before he worked in Beijing University for over 20years(在北京大学工作长达20年之久之前)可知前面的句子该使用完成时(过去的过去),因此A、C选项排除;他叔叔人现在已经不在澳大利亚教学了,故D选项排除(D选项表示动作还在延续).综上,本题答案为B选项.
点评 本题考查不定式的完成时,做此类题目时一定要仔细分析句子结构并结合句子意思确定句子所需时态,再分析各个选项的含义及用法,最终确定正确答案.
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