Are they bookcase 怎样改为单数句?

Are they bookcase 怎样改为单数句? 怎样回答Where are the books?在书柜上bookcase are there any books om the bookcase?答句yes,there are yes,they are They planted one h_____ trees yesterday. There are more than n_____ books in our bookcase. －Where are my _______?－They ________ on the bookcase yesterday morning --Where.are.your.books?--They.are.in--Where.are.your.books?--They.are.in.the.bookcase.（改为单数句）大家这怎么改教教我! They are怎样缩写? Books are on the bookcase .同义句-------- ------- ------ on the bookcase. there are ----- CDs on my bookcase. 第一是对划线部分提问,第二是用所给单词的正确形式填空第一：George is making a bookcase 划线部分是：a bookcase第二：They are on the _________desk.所给单词为teacher They ▁▁▁a bed,a desk,a chair,a sofa,a dresser and a bookcase.A.is B.am C.are D.be These book are on the bookcase?（on the bookcase）划线部分提问 My books and tapes are in the bookcase 对画线部份提问 也就是in the bookcase 补全对话每空一词:( )me.Where are( )my keys?( )they on the sofa?No.they( ).Are they( )your backpa...补全对话每空一词:( )me.Where are( )my keys?( )they on the sofa?No.they( ).Are they( )your backpack?ILook!on that bookcase.Yes,( )my key 情景交际每空一词()me.()()my keys?()they()the sofa?no()().are they()your backpack?i()konw.where is my()?()()under the table?no()()look!on that bookcase.yes,()my keys()you are（） is my computer game on the table?的中文意思Tommy;is my computer game on the table?Sally;no,it isn't.it's on the bookcase. tommy;oh,ok.how about my books? are they on the bookcase,too?sally;no.they aren't.they're on the chair. tommy;oh,so,whe Tommy:Hey,Sally.Sally:yes?T:is my___game on the table?S:No,it___.it is on the bookcase.T:oh,ok,how___my books?are they on the bookcase,___?S:No,they___.they are on the chairT:oh,so,where is my pencil case?S:it is under the table.and ____baseball is u 模仿下面例句回答1.Is he painting the bookcase now?答：No,he isn't but he's going to paint the bookcase.2.Are you putting on your coat?3.Is she washing the dishes?4.Are they doing their homework?5.Are your reading the newspaper?6.Is he flyin