ls this the playground?改成肯定句怎么改

ls this the playground?改成肯定句怎么改 ls there a cat behind the curtains 改为肯定句怎么改? ls there a chair in front of the desk改为肯定句怎么改? ls there any rice in the bowl?改肯定句 ls this tall girl pretty?肯定句 This is the computer room.改成否定句 怎么改 Are the sheep white?改成肯定句怎么改,为什么这样改? 一般现在时结构,肯定句改成否定句,肯定句改成一般疑问句怎么改 ls the rabbit running?改为肯定句 英语I am reading books in the libravy肯定句改成一般疑问句怎么改? they run on the playground怎么改否定句 语文把句子改成肯定句怎么改?