The children won't go to the zoo if it _____(rain) the next day.

问题描述:

The children won't go to the zoo if it _____(rain) the next day.

毋庸置疑,答案是:rains
这是一句条件状语从句,if后面的一句话充当整个句子的状语。
当出现这种情况的时候有个原则:主句将来,从句现在。
很好记吧,这里主句是将来时,所以状语从句中就应用一般现在时,第三人称单数了。
希望对你有所帮助O(∩_∩)O~

rains

The children won't go to the zoo if it __rains___(rain) the next day.

will rain