1、一 短語before long與long before的區(qū)別 before long“很快,不久”的意思,可以用于各種時(shí)態(tài). Before long,he went to America.不久,他就去了美國(guó). I hope to see you before long.我希望不久后再見到你. 而 long before是“很久以前”的意思,一般用在過去時(shí)或過去完成時(shí)的句子里. She said she had read the novel long before.她說她很久以前就讀過這部小說. That happened long before.那件事發(fā)生在很久以前,二 before long

2、 和soon after的區(qū)別 一、before long的用法 意為“不久之后”、“很快”(soon)，用于各種時(shí)態(tài).是詞組表示時(shí)間,單獨(dú)用.位于句首或句尾。 Ill be back before long. 不久我就回來。 Before long he got married. 不久他就結(jié)婚了。 Soon after 不久之后, 稍后,after是連詞,后面跟一個(gè)句子. 1.Soon after we were seated, a waiter came over to our table witha smile. 2.The book was published soon after i

3、t was written.,難點(diǎn) long before有兩個(gè)用法： (1)單獨(dú)使用，before是介詞，詞組表示時(shí)間 She had left long before. That had happened long before. 注：long ago “很久以前”，指的是從現(xiàn)在算起的以前，通常與一般過去時(shí)連用： I met him long ago. 我很久以前就認(rèn)識(shí)他了。,（2）long before后接從句時(shí)，before是連詞。 一 時(shí)間狀語從句，在的很久以前 She had left long before he returned. He had worked in the factory long before he got married. 二 It is/was.long before 肯定句：過了多久才. （時(shí)間長(zhǎng)） 否定句：沒過多久就. （時(shí)間短） It was long before class is over. It wont be long before class begins. It wast long before I learnt the papercut.,共同點(diǎn) Before long he went to Paris.