1, core vocabulary: list the key vocabulary of this unit, such as animals, food, action and other related vocabulary. Each word can be used as a branch. Let's break down its part of speech, meaning and example sentences.

2. Key sentence patterns: Summarize the key sentence patterns in this unit, such as those describing animals and food. These sentence patterns can be used as the backbone of the mind map, and the specific sentences and application scenarios are expanded below.

3. Grammatical knowledge points: Summarize the grammatical knowledge points of this unit, such as the present continuous tense and plural nouns. Specific examples and exercises can be listed under each knowledge point.

4. Situational dialogues: According to the textbook content, design some situational dialogues to help students understand and apply what they have learned. These dialogues can be used as branches of mind mapping. The key sentence patterns and vocabulary of the dialogues are listed below.

5. Cultural expansion: If this unit involves some cultural background knowledge, it can also be expanded in the mind map, such as introducing relevant festivals, customs and habits.

The types of English mind maps in Unit 5, Volume I, Grade Four;

1, hierarchical mind map: This kind of mind map is developed according to the hierarchical structure of knowledge points, and each layer is connected by lines or arrows. For example, the first layer is the unit theme, the second layer is the subtitle of vocabulary, sentence patterns and grammar, and the third layer is the specific knowledge points. This kind of mind map has a clear structure, which helps students to understand various knowledge points step by step.

2. Radial mind map: This kind of mind map takes a central theme as the core and radiates multiple sub-themes. Each sub-theme revolves around the central theme, forming a radial structure. For example, the central theme is "animals", and the sub-themes can be the names, characteristics, habits and so on of various animals. This kind of mind map helps students to associate and expand relevant knowledge points from a central point.

3. Process mind map: This type of mind map is developed according to the process or steps of knowledge, and each step is connected by arrows or lines. For example, the first step is to introduce animals, the second step is to describe the characteristics of animals, and the third step is to practice relevant dialogues. This kind of mind map helps students learn in a certain order and logic, and master the process and application scenarios of knowledge.

4. Conceptual mind map: This kind of mind map focuses on the association and connection between knowledge points, and links related concepts or knowledge points through lines or colors. For example, connect animals with their food, habitat and other related concepts. This kind of mind map helps students to deeply understand the internal connection and correlation between knowledge points and form a systematic knowledge network.