【英语】为什么像tomorrow,last week,yesterday这样的单词前都不用加...答:一、 当时间状语是today, yesterday, tomorrow, tonight, yesterday/tomorrow morning(afternoon, evening)等时,其前不用介词。例如:There was a football match yesterday evening.昨天晚上有一场足球赛。They will go to the zoo tomorrow.明天他们将要去动物园。二、由this, that, these, ...