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shewasconcernedaboutwhethertheywouldbediscovered中concernedabout充当什么成份whethertheywouldbediscovered又充当什么成份

题目详情
she was concerned about whether they would be discovered 中concerned about 充当什么成份 whether they would be discovered 又充当什么成份
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答案和解析
这里 she was concerned 是一个主系表结构,about 是介词 表示对什么担心,whether they would be discovered 是个从句,充当 about 的宾语.所以可以把be concerned about 看成是谓语,whether 引导的从句是宾语从句.