1. First of all, among the three words in PEP English, wind is only a noun, rain and snow are both verbs and nouns, and all three words become adjectives and then y is added.

2. Secondly, when rain, snow and wind are used as verbs, the adverbs behind them can be hard, indicating strong, but when rain, snow and wind are used as nouns, adjectives cannot be hard.

3. Finally, the changes of different tenses in verb predicates can be changed.