Rain is a notional verb. When it appears in general interrogative sentences, it should be modified by the auxiliary verb do or the deformation of do (such as does, did, etc.). ), and is is a copulative verb, which can't modify a notional verb.

Let me explain something to you.

Notional verbs and copulative verbs are two relative concepts. A copula, also known as a copula, has its own meaning, but it cannot be used as a predicate alone. It must follow the predicate to form a copula structure to explain the subject's situation, nature and characteristics. For example, be verb series, seem and sound all belong to copula verbs (for example, that sounds good! )。 The notional verb has a complete meaning and can be used as a predicate independently, but it needs an auxiliary verb to "help" when it becomes a general question, so this explains why does is meaningless in this sentence, but it must appear.

Your sentence can be said to be "Is it raining in summer", which means the continuous state of rain in summer (with complaining tone), while the original sentence emphasizes the general state and has no emotional color. This can be changed because the present participle form of verbs can be used as predicates. In this sentence, is is the copula, the subject, raining is the predicate, in summer is the adverbial of time, and the word order of the declarative sentence should be subject, department, table and tense. In the original sentence, does is an auxiliary verb, it is a subject, rain is a predicate and rain is an intransitive verb, so there is no need to add an object after it. The word order of declarative sentences should be subject and predicate (note that declarative sentences do not need auxiliary verbs unless they emphasize actions).

Grammatical questions are actually easy to fill in. Ask a teacher to tell you about the basic sentence structure (five kinds: subject-predicate, subject-predicate-object, family table, subject-predicate-object+object complement, subject-predicate-object+direct object), and you will say everything. There is nothing difficult to understand, just write it down as a mathematical formula. Come on ~ find a good way early.