短文改错
假定英语课上老师要求同桌之间交换修改作文， 请你修改你同桌的作文。文中共有10处错误， 每句中最多有两处。错误涉及一个单词的增加，删除或修改。
增加：在缺词处加一个漏字符号∧，并在其下面写出该加的词
删除：把多余的词用斜线﹨划掉。
修改：在错的词下面划一横线， 并在该词下面写出修改后的词。
注意：1.每处错误及其修改均仅限一词；
2.只允许修改10处，多者（从第11处起）不计分。
Thank you very much for invite me to your birthday party in Saturday morning. I'd like to come and I have to go to my hometown to see my grandparents. They were very old and unluckily they are not in a good health recently. My mother has already made a telephone calling to them and promised visit them with me this Saturday. My mother said we will stay at my grandparents' home the whole weekend. So I'm real sorry I can't attend your party. I hope you will understand all this. Here I wish you a lot of fun on your birthday and much happy returns of the day.