问题标题：
【It'sgoingto后面一般是动词原形,为什么有些还加be再加原形?还是都可以IndowntownLosAngeles,it'sgoingtobesunnyandcleartomorrowmorning.Intheearlyafternoon,it'sgoingtobewindy.Inthelateafternoon,it'sgoingto】
问题描述：
It'sgoingto后面一般是动词原形,为什么有些还加be再加原形?还是都可以
IndowntownLosAngeles,it'sgoingtobesunnyandcleartomorrowmorning.
Intheearlyafternoon,it'sgoingtobewindy.
Inthelateafternoon,it'sgoingtobecloudy.
Intheearlyevening,it'sgoingtorainindowntownLosAngeles.
Butinthemountains,it'sgoingtosnow.
程志奇回答：
IndowntownLosAngeles,it'sgoingtobesunnyandcleartomorrowmorning.
Intheearlyafternoon,it'sgoingtobewindy.
Inthelateafternoon,it'sgoingtobecloudy这三个句子都是说天气情况的,sun、wind、cloud、都是名词,不可以直接跟在it'sgoingto后,所以要借用be动词,be就是动词原形,这样才符合语法.
Intheearlyevening,it'sgoingtorainindowntownLosAngeles.
Butinthemountains,it'sgoingtosnow.这两个句子虽然也是说天气,但是rain、snow都可以作动词使用,故不用借助be动词.
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