Tell Helen,if she is at home,that i will come to see her.为什么这句中要加that?

Tell Helen,if she is at home,I will come to see her.改写句子 Tell Helen,if she is at home,that i will come to see her.为什么这句中要加that? she is his sister,helen. She is as fair as Helen . Is she helen 作为否定回答 the sister said that she would come to see me next week改错改错.还有一句：helen is sure if she will become the best student Helen is seven years old.Helen is seven years old.One day one of her teeth began to hurt.She __1__ in class and her teacher __2__ kindly,“What’s the matter,Helen?”“One of my teeth hurts,” answered Helen.“Tell your mother about __3__,” s Helen is from America.She is A______.(语句通顺） She is helen.怎么改为同义句?------ ------ helen.只有两个空哦! she is indeed Helen of Troy 如何翻译? Helen is a good student.But she runs slow.改错 Helen ,she is the girl l told you ____________. Helen's mother is looking for she改错 帮忙做一个完形填空Helen is seven years old.One day one of her teeth began to hurt.She __1__ in class and her teacher __2__ kindly,“What’s the matter,Helen?”“One of my teeth hurts,” answered Helen.“Tell your mother about __3__,” 英语翻译could u tell me if there is anyone who do not think u r the cutest?if there is,she or he must be ccrazy. 英语选择填空：( ) mother is she?( ) is Helen's.A.who；She B.Who's；She C.Whose；She if she is all right If your sky is gray Oh,tell