This dog is Helen's对吗这句话的语法上有错误吗?

This is Helen's dog.this coat is helen's意思都一样吧 第一个是形容词性修饰dog第二个是 名词性独立做什么语?宾语么this dog is helen's This dog is Helen's对吗这句话的语法上有错误吗? This is Helen's present划线提问 Helen's 划线 That is Helen ’s green blouse对Helen’s提问 ①this ②is ③dog ④Helen's ⑤no ⑥isn't ⑦it请用这些单词组成一句英文句子. This is Helen. This is my friend.her name's Helen .____is Engilsh this is helen's coat 划线提问 同义句-------- This comb is for Helen's 错在哪 This diamond rubber is Helen's.diamond划线部分提问 英语：判断正误Hello,I'm a boy.My name is Tom.This is my friend Helen.Helen is a girl.Let's go to my playhouse.It's very nice.Look,the red and yellow toy car is new.It's my favorite toy.That's a toy plane.It's bule.Can you see a white toy dog i This is Helen speaking.对画线部分提问划线部分是Helen It is Helen's computer game（Helen's computer game划线）对划线部分提问 对画线部分提问 ①That is Helen’s sweater.②The dog is under the bed.③Mike can sing the song.画线部分分别是：①Helen’s②under the bed③sing the song给的句子是：①_____ _____ is that?②_____ _____ the dog?③_____can M the red skirt is (Helen's) 对划括号提问 The yellow coat is Helen's.(对yellow提问) Helen's sweater is red.(对画线部分提问) This is Helen中文怎么说