"Do you know what the best thing is"与"Do you know what is the best thing to do"这两个句子中,"is"的位置为什么不一样?

题目

"Do you know what the best thing is"与"Do you know what is the best thing to do"这两个句子中,"is"的位置为什么不一样?

答案

第一句 what the best thing is 是动词know的宾语从句,原句是What is the best thing?问句作从句要变成陈述句形式.比如 where is the bus stop,Do you know where th bus stop is.第二句在语法上有误.is也应该倒过来...