题目
The twins, who finish their homework, were allowed to play badminton on the playground.A. will finishB. finishC. have finishedD. had finished
The twins, who
finish their homework, were allowed to play badminton on the playground.
A. will finish
B. finish
C. have finished
D. had finished
题目解答
答案
D. had finished
解析
步骤 1：分析句子结构
句子的主干是"The twins were allowed to play badminton on the playground."，其中"who _____their homework"是定语从句，修饰先行词"the twins"。
步骤 2：确定时态
根据句子的语境，"were allowed"表明主句的动作发生在过去，而定语从句的动作"finish their homework"发生在主句动作之前，因此需要使用过去完成时。
步骤 3：选择正确答案
根据以上分析，定语从句中应使用过去完成时，即"had finished"。
句子的主干是"The twins were allowed to play badminton on the playground."，其中"who _____their homework"是定语从句，修饰先行词"the twins"。
步骤 2：确定时态
根据句子的语境，"were allowed"表明主句的动作发生在过去，而定语从句的动作"finish their homework"发生在主句动作之前，因此需要使用过去完成时。
步骤 3：选择正确答案
根据以上分析，定语从句中应使用过去完成时，即"had finished"。