"Error Analysis of 900 Sample Sentences " is for the mother tongue to the mother tongue or the media language of foreign friends in the study of foreign language in the prevalence of typical illness analysis or comparison, in order to make the reader know which is wrong, which argument is correct. After the book compiled a disease index, the purpose is to explain the different stages of learning the disease is different. The book is in the form of a Chinese-English contrast. The above three points are different from other books on the analysis of the disease. This book is for foreign friends to learn Chinese or use Chinese, but also as teaching Chinese as a foreign language teaching or writing a textbook reference book.