题目
Scientists think that the continents ______ always where they ______ today.( )A. aren't; areB. aren't; wereC. weren't; areD. weren't; were
Scientists think that the continents ______ always where they ______ today.( )
A. aren't; are
B. aren't; were
C. weren't; are
D. weren't; were
题目解答
答案
C. weren't; are
解析
本题考查动词时态的正确使用,需结合语境判断两个空格的时态关系。关键点在于:
- 主句与从句时态的呼应:主句中的
think为现在时,但描述的是科学家对过去事实的判断,需用过去时态表达过去的事实。 - 否定词的位置:
not ... always的结构中,always强调“并非一直如此”,需结合时态选择正确的动词形式。
第一空分析
- 语境判断:科学家认为大陆过去并非总在现在的位置,因此需用过去时态。
- 选项对比:
weren't(过去时)正确,aren't(现在时)不符合“过去事实”的语境。
第二空分析
- 语境判断:
where they ______ today描述的是现在的位置,需用现在时态。 - 选项对比:
are(现在时)正确,were(过去时)与“today”矛盾。