题目内容
12.一 Has Robert got home?一 Not yet.He ______ be home by now.( )
A. | can | B. | need | C. | must | D. | should |
分析 -罗伯特已经到家了吗?
-还没有.他现在本应该在家的.
解答 答案:D
句意表达的是与现在事实相反的假设;can可能,need需要,must一定,should本应该.故选D.
点评 虚拟语气是表示与事实相反的假设,构成方式有:对现在或将来,条件句中用一般过去时态,主语用情态动词加动词原形;对过去,条件句中用过去完成时态,主语用情态动词加完成时态.学习时,要牢记构成方式.
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