Itsinceitbefore句型和练习(最新整理)

1、it+be+时间+before/since/when/that 句型辨析i. since1. it is/has been+时间段+since sb did sth 某个动作发生持续多久eg:it is/has been three years since he finished the work.自从他完成这项工作已经三年了.2. 该句型中若 since 后跟延续性动词，要翻译成否定含义,即“没做某事已经多久了”.eg:it has been three years since he worked here.他不在这工作已经三年了.it has been three years since

2、he smoked.他已经戒烟三年了.但是：it has been three years since he began to smoke.他吸烟有三年了。ii. before.1. it was/will be+时间段+before. 过多长时间将发生某动作或事情；或过了多久发生了某事或动作。eg:it was three years before he finished the work.他花了三年才完成这项工作.it will be three years before he finishes the work.他得花三年才能完成这项工作.2. it wont be/take long

3、before.不久就会eg:it wont be long before he finishes the work.他不久就会完成这项工作.iiiwhen.when 没有固定与 it is连用的句型.when 可表示时间点或时间段，因此从句中短暂性动词或延续性动词均可用.when 还可作并列连词，表示突然发生一个动作,等于 and at that time.常用句型:1 主语+was/were doing when.2 主语+was/were about to do when.it+be+时间+before/since/when/that 重要考点练习it +be+时间+before/sinc

4、e/when/that是高考中每年必考的重要考点，而学生却对这个句型中几个关联词的选择把握不准，造成失分。我在试题讲解的过程中设计了以下几个小题，让学生去分析，整理，归纳，效果很好。1. it was two yearshe realized the truth.2. it will be two yearsthe economic situation improves.3. it was two years laterhe realized the truth.4. it is /has been two yearshe lived here.5. it was midnighthe arr

5、ived home.6. it was at midnighthe arrived home.7. it was not until midnighthe arrived home.a. beforeb. whenc. sinced. that答案与解析1、2 两个小题都选 a. 第一题意为：两年后他才得知真相。第二题意为：经济形式要等两年后才会有所好转。归纳it was/ will be +一段时间+before+句子是高考一个重要考点。意为：多久之后才要注意：it will be +一段时间+before+句子，before 引导的是一个时间状语从句， 所以后面的从句要用一般现在时态表将来

6、。3. d 此题为强调句型。把 it wasthat 去掉后，句子仍然成立：he realized the truth two years later.4. c 本句意为：他不住在这儿已经两年了。归纳为 since 意为自从某时或某事发生以来，故 since 后从句时，从句的时态应用一般过去时态，而主句应用现在完成时态。如表示某某事发生多久了，则用：it is/ has been+一段时间+since+从句。注意it is/ has been+一段时间+since+从句。在本结构中，从句的谓语动词如为延续性动词时，翻译时要从动作结束时算起。5. b 本句为定语从句，先行词为 midnight，

7、在从句中作状语。要注意与第 6 小题的区别，第 6 题为强调句型，故答案应为 that.6.d 再看下面两题：（1） it was the parkhe first met his wife.（2） it was in this parkhe first met his wife.第一题答案应为where，为定语从句；第二题答案为 that,为强调句型。7.d 本题亦为强调句型结构：it was not untilthat意为：直到才“”“”at the end, xiao bian gives you a passage. minand once said, people who learn

8、 to learn are very happy people. in every wonderful life, learning is an eternal theme. as a professional clerical and teaching position, i understand the importance of continuous learning, life is diligent, nothing can be gained, only continuous learning can achieve better self. only by constantly learning and mastering the latest relevant knowledge, can employees from all walks of life keep up with the pace of enterprise development and innovate to meet the needs of the market. this