That's my book.This's your book.为什么that's可以连写

That's my book.This's your book.为什么that's可以连写 that's my book.this's your book.有没有语病 this book is my friend's对吗 写出下列句子的复数形式this is my book.is that your sister?that is my baseball.is this your friend?what's this in english? I like this book.It's my f____ book. [1.This`s 2.this is 3.that]a book. Is this your book?单复数句互变That's his dictionary.These're my pencils.Those are baseballs. 【英语】__my book.__your book.A.This is；That's B.This's；That's C.This is;It's D.This's；That is如上 This is my brother's book这里my brother's 都是修饰book吗? That' s my mother's book.改为否定句 Are ( )Kate's ( A.this,book B.that,book C.these,books D.those,book This book is my brother's改为同一句 告诉我选择这个答案的原因.告诉我英语的缩写形式用在什么地方,什么地方不能用._____ my book.____ your book.A.This is ,That’s B.This’s ,That’s C.This is ,It’s D.This’s ,That is Hello!That is my friend,Lily.这句话错在哪里?怎么改?-What's this?-This is a book.还有这句。 1、This is （）box.That is （）orange.2、What is that in English?It‘s（）desk.3、That is () egg.It's () good egg4、This is my () book.that's your ()book.5、Is that () bus?NO,it's ()old car.6、There is （） “s”“ in the word bus This is my book.That book is y-----填人称代词的适当形式 This is my book and that is your book.（改为同义句） This is my book,and that is his book(改为复数句）