题目内容
16.--Excuse me, you ever a UFO?--Yes.I saw one in the sky while I_____ back home last month.( )
| A. | did; see; walked | B. | have; seen; walked | ||
| C. | did; see; was walking | D. | have; seen; was walking |
分析 --请问,你曾经见过UFO吗?
--是的,上个月当我正走回家时我在天上看见一个UFO.
解答 答案:D
第一空,根据句意你"曾经"见过UFO吗?表示曾经做过某事,应该用现在完成时,现在完成时态的构成:助动词have/has+过去分词,所以第一句的两个空应该是have seen.第二句根据句意 上个月当我"正走回家时"我在天上看见一个UFO.表示在过去某一时刻或某一段时间内进行或发生的动作用过去进行时,过去进行时的构成是was/were+现在分词,主语是I,所以应该填was walking.故选D.
点评 本题主要考查动词时态,做此类题目要注意时间状语、标志词.根据上下文所表达的含义,做出判断.同时更应记清时态的构成形式.就本题而言,主要考查现在完成时态和过去进行时.
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