it's rainy指的是下雨天，it's raining是說正在下雨，理論上來說兩個(gè)是不相等的。比如外面正在下雨你就可以和別人說it's raining now。如果是描述今天的天氣狀況可以說it's rainy today。

it's rainy和it's raining的區(qū)別

raining

1.It was raining when we set out. 我們出發(fā)時(shí)正下著雨。

2.Yesterday the radio forecast drizzle,and today it is indeed raining. 昨天預(yù)報(bào)有小雨，今天果然下起來了。

3.It's raining hard. 雨下得正急。

4.It's raining rustlingly. 雨刷刷地下起來了。

5.Hurry in,children.It's raining! 孩子們，快進(jìn)來，下雨啦！

rainy

1.They walked along the promenade on a rainy night. 他們?cè)谝粋€(gè)雨夜沿著海濱道散步。

2.The rainy season in the Andes normally starts in December. 安第斯山區(qū)的雨季通常在12月份來臨。

3.The rainy season has ended at last. 雨季總算過去了。