这句话有什么问题~THIS IS A HAIR~这句话有什么问题?怎么改?不是小写的问题~

这句话有什么问题~THIS IS A HAIR~这句话有什么问题?怎么改?不是小写的问题~ This is my weekend这句话有语法问题吗 This is a orange . It's nice.这句话有什么错? Is this a key?Yes,its.这句话有什么错? this is a place where used to be many emporers这句话有什么语法错误 this ruler is precise to within a millimeter这句话有问题吗?句子里的to是什么词性的? this is a good news这句话有没有错 this is our the first English lesson.这句话哪有问题 This is a key to opening this door这句话有问题吗?This is a key to opening this door.还是This is a key to open this door.是哪个对?这里的to是当作介词还是不定式? This's a dog.这句话有什么错? This is the second time that i saw this film,so impressive to me!这句话有没有时态问题? This is a comedy called NO.1.为什么这句话既有“is”又有called 帮我看看这句话有没有语法问题English is a language that most of the people in this world use to communicate 这句话有没有问题I mean...he didn't think this is a good idea until I promised I would go back home This is the second time that i saw this film,so impressive to me!这句话有没有问题?前面那一部分时态有问题吗? He lookes at the girl is crying.这句话有什么问题?The bird fly.这句话有什么问题?还有 He opens the door.he gives me a book.这些句子有什么问题? She is going to give me a necklace this weekend.这句话有什么错误?（提示：错误在“is”或是“me”上 She is going to give me a necklace this weekend.这句话有什么错误?（提示：错误在“is”或是“me”上)