These be his books的正确形式

These be his books的正确形式 These---(be)his English books 用be的适当形式填空：These books in the backpack This his watch .It white are,his,these,books(?)(连词成句) 做否定回答.Are these his books? these books can be o_____ online. these be books中be的用法正确吗一般疑问句怎么改告诉我吧很急 These are ( )(她的)books [ ]Are these ________?A,yours books B,books thrirs C,book his D,his book 用be的合适形适填空These books ______in the backpack. 用be的合适形适填空These books ________.It ______white. These books are theirs. 的同义句 These are their books的同义句 用be(is,am,are)的适当的形式填空.1.This( )my mother.2.These( )our books. 这些书中没有一本是有用的.填什么?（ ）（ ）（ ）these books can be useful that is your mother these are her books these are his brothers those are his my 怎么变一般疑问句 根据句意用所给单词的适当形式填空Who___（be）these girl?Those___（be）my dictionaries.What___（be）these?This is Harry’s pen and___（this）are Lily’s books.Are ___（is） pens? all these books need to be packed into the boxes为什么要用be