(完整word版)英语语法中的八种时态.pdf
1 一般现在时主语+系动词 标志词有 often,usually,always 等要注意“单三”,即 he she it 2 现在进行时主语+be 动词+动词-ing 形式 标志词有 now,at this time 3 一般过去时主语+动词过去式标志词有 ago,yesterday,the day before yesterday,last week,just now等4 过去进行时主语+was/were+doing 标志词有 at that time等5 现在完成时主语+have/has+done 标志词有 recently,lately,since 6 过去完成时主语+had+done 标志词有 before,by the end of last year等7 一般将来时主语+am/is/are/going to+do;will/shall+do.;be+doing标志词有 tomorrow,next day(week,month,year),soon等8 过去将来时主语+was/were/going to+do;would/should+do 标志词有 the next day等时态是英语学习中一个至关重要的内容,广大初中学生在实际运用时,往往对时态总是倍感棘手,下面我们就归纳复习一下这几种时态。一、一般现在时:概念:经常、反复发生的动作或行为及现在的某种状况。时间状语:always,usually,often,sometimes,every week(day,year,month ),once a week,on Sundays,etc.基本结构:be 动词;行为动词否定形式:am/is/are+not;此时态的谓语动词若为行为动词,则在其前加 dont,如主语为第三人称单数,则用doesnt,同时还原行为动词。一般疑问句:把 be 动词放于句首;用助动词do 提问,如主语为第三人称单数,则用does,同时,还原行为动词。二、一般过去时:概念:过去某个时间里发生的动作或状态;过去习惯性、经常性的动作、行为。时间状语:ago,yesterday,the day before yesterday,last week(year,night,month),in 1989,just now,at the age of 5,one day,long long ago,once upon a time,etc.基本结构:be 动词;行为动词否定形式:was/were+not;在行为动词前加didnt,同时还原行为动词。一般疑问句:was或 were放于句首;用助动词 do 的过去式 did 提问,同时还原行为动词。三、现在进行时:概念:表示现 阶段或说话时正在进行的动作及行为。时间状语:now,at this time,these days,etc.基本结构:am/is/are+doing 否定形式:am/is/are+not+doing.一般疑问句:把 be 动词放于句首。四、过去进行时:概念:表示过去某段时间或某一时刻正在发生或进行的行为或动作。时间状语:at this time yesterday,at that time或以 when引导的谓语动词是一般过去时的时间状语等。基本结构:was/were+doing 否定形式:was/were+not+doing.一般疑问句:把 was或 were放于句首。文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9五、现在完成时:概念:过去发生或已经完成的动作对现在造成的影响或结果,或从过去已经开始,持续到现在的动作或状态。时间状语:recently,lately,sincefor,in the past few years,etc.基本结构:have/has+done 否定形式:have/has+not+d one.一般疑问句:have或 has。六、过去完成时:概念:以过去某个时间为标准,在此以前发生的动作或行为,或在过去某动作之前完成的行为,即“过去的过去”。时间状语:before,by the end of last year(term,month),etc.基本结构:had+done.否定形式:had+not+done.一般疑问句:had放于句首。七、一般将来时:概念:表示将要发生的动作或存在的状态及打算、计划或准备做某事。时间状语:tomorrow,next day(week,month,year),soon,in a few minutes,by,the day after tomorrow,etc.基本结构:am/is/are/going to+do;will/shall+do.文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9否定形式:was/were+not;在行为动词前加didnt,同时还原行为动词。一般疑问句:be 放于句首;will/shall提到句首。八、过去将来时:概念:立足于过去某一时刻,从过去看将来,常用于宾语从句中。时间状语:the next day(morning,year),the following month(week ),etc.基本结构:was/were/going to+do;would/should+do.否定形式:was/were/not+going to+do;would/should+not+do.一般疑问句:was或 were放于句首;would/should提到句首。.几种常见时态的相互转换英语中的几种时态在一定情况下可以互相转换,以下是几种常见的转换形式:一、一般过去时与现在完成时的转换在现在完成时中,延续性动词能与表示一段时间的状语连用,瞬间动词却不能。但是,可用别的表达方式:瞬间动词用于“一段时间+ago”的一般过去时的句型中;瞬间动词可改成与之相对应的延续性动词及短语,与一段时间连用;瞬间动词用于“It is+一段时间+since+一般过去时”的句型中,表示“自从 以来有 时间”的意思,主句一般用it is来代替 It has been;瞬间动词用于“Some time has passed since+一般过去时”的句型中。请看:A.He joined the League two years ago.B.He has been in the League for two years.文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9C.It is two years since he joined the League.D.Two years has passed since he joined the League.二、一般现在时与现在进行时的转换在一般现在时中,at 加上名词表示“处于某种状态”,如 at work(在工作),at school(上学、上课)等。此短语可与进行时态转换。请看:Peter is at work,but Mike is at play.Peter is working,but Mike is playing.三、现在进行时与一般将来时的转换在现在进行时态中go,come,leave,start,arrive等动词常与表示将来的时间状语连用表示将要发生的动作。如:I am coming,Mum!意为“我就来,妈妈!”请看:The train is leaving soon.The train will leave soon.四、“be going to+动词原形”与“will(shall)+动词原形”结构的转换“be going to+动词原形”、表示打算、计划要做的事;将来时“will(shall)+动词原形”结构在书面语中,当主语为第一人称时,常用助动词shall。在口语中,所有人称都可以用will。请看:We are going to visit the Great Wall next Sunday.We shall visit the Great Wall next Sunday.文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9文档编码:CG9V3Y9P8M10 HX8U6U2V9G2 ZG4C3L8O4H9