It rained hard yesterday.(改为否定句) It____ _____hard yesterday. 还有一个. ——____ youy brother _____(watch)TV every day? ——No.He_______ (not watch)it last night.
It didn't rain hard yesterday. rained是一般过去式,所以否定助词用didn't ,后接动词原形rain ——Does youy brother watch TV every day? ——No.He didn't watch it last night.every day每天,句子要表达的是一个状态,是每天都发生的,所以用一般现在时;而last night昨天晚上,特指过去了的一个时间,所以用过去式,根据括号里的提示,要否定回答,则用didn't.