英语句子单数改复数!1、it's a knife.2、this is my book.3、what's this?4、w

英语句子单数改复数!1、it's a knife.2、this is my book.3、what's this?4、w 英语!单数句改复数!1.He is a boy2.This is his pen3.It's an English bo this is my knife改复数句 It is a book.(仿照例句,重写句子)例:What's is this?=What's this? This is a book,It's an English book.What's this?急. 英语改复数形式改这几个哈……1、It's a knife.2、He is an English teacher.3、I' 单数句改为复数句：1.This my aunt.2.It's a nice photo.3 what's this?It's window.改复数句 把下列句子变为复数.This is a watermelon.It is yellow shirt.That's my 英语 改复数句This is a pen.Is this your backpack?It's a black bag 句型转换（1）that's an english book 改否定句(2)this is a boy 改复数句(3)th This is a book.(It's,Its)