he wants is a book.这句话,为什么要在最前加what?

he wants is a book.这句话,为什么要在最前加what? What he wants is a book.改为 一般疑问句和特殊疑问句?怎么改? 英语What he wants is a book这句话把what会怎么样?为什么?这句话把what去掉会怎么样？为什么？ he wants to buy himself a book.(同义句)he wants to ___ ____ ____ ___himself. he wants to buy himself a book.（同意句） He is reading a book. Who wants to borrow a book?Amy does还是is This is useful book.He wants to buy it at one.A,a quite B,quite a C,an quite D,quite an选哪个？为什么 He wants the latest book there is on the subject.语法分析 He is taking and reading a book. He is reading a book 变成一般将来时 He is sale a book,病句吗 he wants to get a book to read.请分析下句子成分..to get 做状语? He wants to buy a book 怎么变否定句?要快 he wants to borrow a book _____ historyA.on B.for C.in D.of He is a lazy man whom nobody wants work with him.这句话对吗 It is a interesting book that he is reading这句话有语病不? He sells a book和He is sale a book,还有中文意思