我怎么觉得Please put the book where it was这句话这么别扭呢?我觉得应该是Please put the book in where it was,要不put不是不及物动词吗,我觉得就是Please put the book in where it was，where it was作in的介词宾语，where作it was的地点状语

Please put the book in where it was - 更别扭呢，因为是错的
Please put the book where it was
其实就是
Please put the book (back to) where it was

Please put the book where it was.
Please put the book in which it was.
这两句都对，where前面不能加in,of,on之类的介词，但是这些介词可以和 which搭配连用
put是及物动词

不要加in
put是及物动词没错,但是它后面不是跟了东西吗?the book就是put后面跟的东西.还有要记住,where是在这里关系副词,前面不能加介词的,就如,回家,go home,home在这里是副词,不加介词,不能说go to home,当然home前面要是加了具体的修饰词的话另当别论,如go to Tom's home,这里的home就只是名词
where 所引导的从句是整个句子的状语,而where在从句中是表语,不是状语,反正记住了,副词前不能有介词

你好，这里不能用介词in，因为这里的关联词where就是in which,可以转换成这样：Please put the book in which it was,就可以了！o(∩_∩)o...