摘要:宾语从句在句中作宾语.引导宾语从句的that可以省略.whether和if可互换.但介词宾语或有or not时.用whether. ▲They know that the habit may kill them. 他们知道这个习惯能使他们致死. ▲They doubt whether or not Jack is a good student. 他们怀疑Jack是否是一个好学生. ▲They wanted to see which shops offered the best advice and service. 他们想了解哪家店提出的建议和提供的服务最好.

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