Question

it's raing today.i don't like the rainy.改错rainy为什么要改为rain

Answer 1

rain 是名词，指“雨，雨水”。
rainy 是形容词，表示“下雨的，多雨的”。
原文第二句指的是“我不喜欢雨”，显然是名词“雨”。如果是下雨天，则要说rainy days。

Answer 2

作宾语用名词rain

rainy是形容词 "下雨的"

It's raining today. I don't like the rain.

Answer 3

可以有两种表达方法：

It's raining today. I don't like the rain.

今天下雨。 我不喜欢雨。

It's raining today. I don't like rainy day.

今天下雨。 我不喜欢下雨天。

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i don't like

英[aɪ dəʊnt laɪk]

美[aɪ doʊnt laɪk]

网络 我不喜欢; 尽管不喜欢; 虽然不喜欢;

[例句]I don't like him waltzing into the house as if he owned it.

我不喜欢他像房主似的大摇大摆走进屋来。

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 l. dont. like后面接 加名词或者动词ing 

例句: i don't like playing computer games