ls this your pen?yes,itisn't 哪里错了?

ls this your pen?yes,itisn't 哪里错了? ls this your pen?(改为肯定句） ls this your pen改为否定回答,怎么改 Is this your pen?Yes,___(thank). 英语ls this your ls this your ls this your school? is this your pen?----yes,it's. 改错 找出错误并改正 ——ls this your bike?——yes this is （ ）（ls this/are these）your picture books?yes（ ）（ls this/are these）your picture books?yes,( )(it.is/they are).填空 is this your pen? 为什么答案上面是 yes this is 怎么不用yes it is ... ls++this++your++school是什么意思 Is this your pen Yes,I think it's her pen.请找出句子的错误 Is your pen?—Yes,it is.不能用Yes,this is. 把下列句子改为复数句子That is my sister Ls this his parent Ls she your friend Yes it is This is my cup 急 ls this a book Yes,this is.谁会修改? ls this your computer?改为肯定陈述句 ls this your schoolbag的中文是什么