This book is not a systematic explanation of Chinese grammar, but the selection of the difficult problems 30 Grammar Teaching often encountered, such as: "Yes" equal is not equal to "to be"? "Can not go in" and "get in" the same is not the same? Acrostic how to teach? "Often" "often," "frequently," the same is not the same? The book is to explain the precise and appropriate, in layman's language, focusing on comparison of English law, rich and typical sentences are very competent foreign language teachers teaching reference books, but also can be used for mid-level Chinese learners self-use.