这个表达方式来自于英文动词 "rain",意思是 "下雨"。在这个句子中,"it" 是形式主语,"is" 是助动词,而 "raining" 则是 "rain" 的现在进行时态。
下面是一些例句,可以帮助你理解这个表达方式的用法:
It's raining outside. (外面在下雨。)
I can't go for a walk because it's raining. (我不能散步,因为在下雨。)
It looks like it's going to rain soon. (看起来很快就要下雨了。)
I don't like it when it's raining. (我不喜欢下雨的时候。)

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最佳回答 2023-05-05