2. Key words: mean. Meaning: intention; Means; Predict; Of great significance; Miserable; Mean; Inferior; Fierce; Average; Simple; Of humble birth; Changes in word use: what. When what is used as an interrogative pronoun, its basic meaning is "what, what, what", which is used as an interrogative sentence and a sign of special interrogative sentences.

3. When what is used as a relative pronoun, its meaning is "What? Things (things) ". Can be used to guide subject clauses, predicative clauses, object clauses or appositive clauses. When introducing a subject clause, the noun it refers to must be singular. When the subject is singular, the predicate verb is generally singular, but sometimes it can be plural because there are plural nouns after the predicate verb; When what leads an object clause, it is often placed after the predicate, and when it is used as a predicate, it is placed after the copula. What can also guide adverbial clause, meaning "No matter?" . Can also be followed by infinitive phrases.