The first paragraph of the fifth grade experimental textbook of compulsory education curriculum standard 16 "It was dawn and suddenly it rained heavily". Like splashing water. Like falling. Some teachers think this sentence is a metaphor, and the resource book "Ding Jian Teaching Plan" also says that "this sentence is a metaphor of heavy rain". The author disagrees. What is metaphor? Metaphor is "analogy", that is, two different things have similarities with each other, and one thing is used as a metaphor to compare the other. Metaphor generally consists of three parts, namely, ontology (the object to be compared), vehicle (the object to be compared) and figurative words (the symbolic words of figurative relations). It can be seen that there are two necessary conditions for the formation of metaphor: first, ontology and vehicle must be essentially different things, otherwise metaphor cannot be formed; But there must be similarities between ontology and carrier. Generally speaking, unusual things are expressed through other things that are similar to it. "The rain suddenly became very heavy, falling like water. "This sentence describes a scene of a heavy rain, and the teacher who thinks it is a metaphor says that this sentence compares" a scene of a heavy rain "to" splashing water ". In fact, "pouring water" is also a kind of scene, and it cannot be said that this scene is like that; Moreover, "rain" and "water" are essentially the same thing, and "water" cannot be used to compare "rain", that is, similar things cannot be compared, and it cannot be said that "he looks like his father" is a figurative sentence. Similarly, "it suddenly rained heavily, like pouring, like falling" is not a figurative sentence, which is a bit exaggerated. There are many such sentences. For example, "The sun is really poisonous, like burning the ground", "The wind blows on my face like a knife" and "My heart is like a knife". These sentences all have exaggerated elements, not figurative sentences. However, I don't think it is accurate enough to say that "this sentence is a metaphor for heavy rain" in the information book of Ding Jian Religious Plans.