宾语从句指的是在一个主句中，作为宾语的句子。宾语从句在英语中有多种形式，其中最常见的是简单句形式。
简单句形式
简单句宾语从句由一个主语和一个谓语构成，通常在主语后面加上一个连词来引出从句。以下是一些常见的简单句宾语从句的句型：
- I know {that} she is coming.
- He said {that} he would help me.
- She asked {if/whether} I wanted to go with her.
- They wondered {where} he had gone.
以上句子中用花括号标出的词就是引导宾语从句的连词。需要注意的是，在使用宾语从句时，连词的选择非常重要，不同的连词可以引导不同类型的从句。比如，if/whether 用来引导一个疑问句，that 则是可省略的连词，而 where 则用来引导一个地点状语从句。
练习
为了帮助大家更好地掌握宾语从句的简单句形式，以下是一些练习题：
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Can you tell me {when} you will be back?
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She doesn't know {if/whether} she should accept the job offer.
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He asked me {where} I had bought the dress.
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They insisted {that} they had done nothing wrong.
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I wonder {how} she managed to finish the task so quickly.
以上练习题可以帮助读者巩固宾语从句的简单句形式的使用。需要注意的是，掌握宾语从句不仅需要理解其语法规则，也需要在实际运用中不断练习和积累。
