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【小编编语】今天英语网小编教给同学们的是初中英语时间介词的用法，一起来学习下吧! “before+某时只是单纯的指在某时以前;by+某时指不迟于某时The sun will rise before six o’clock.太阳会在六点之前出来.The sun will rise by six o’clock.太阳最迟在六点出来. to,till与until：1.和from的搭配:from…to;from…till;from…until：He teaches from midday to four o’clock.他从中午教书一直到四点.They are out together with their friends from morning till night.他们从早到晚和朋友一起在外面.It was cold from Christmas until April.从圣诞节直到四月份天气一直是冷的. 2.不和from的搭配They talked till dawn.他们交谈直到天亮.Wait until tomorrow.等到明天. 3.和not搭配:not until;not till:He didn’t return till ten o’clock.直到十点他才回来.He didn’t go until night.直到夜晚他才走. since和from1.since自从…以来(包含有从过去某一时间开始一直延续到现在之意)常用于现在完成时.I haven’t been home since 1995.从一九九五年以来我都没有回过家.2. from从…(有:从…开始之意)I shall be in New York one week from today.从今天算起我要在纽约一个星期.from March to June 从三月份到六月份from morning till night从早到晚 | 
