not-until用法总结 PPT
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not until用法总结
not until在具体语境中的应用
常见错误解析
误用not until作为副词导 致句子意思不清
误用not until作为连词导 致句子结构混乱
误用not until作为形容词 导致句子语法错误
误用not until作为名词导 致句子语义不明
实际例句解析
"I didn't go bed until I finished my homework."
"She didn't et until she ws hungr y."
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"He didn't leve until the rin spped."
"They didn't strt the project until they hd enough resources."
非延续性动词：表示动作或状态的瞬间完成如die, rrive, finish等
not until的特殊用法：在含有延续性动词的句子中not until表示“直 到...才...”如“I didn't go bed until I finished my homework.” 在含有非延续性动词的句子中not until表示“直到...才...”如“I didn't go bed until I finished my homework . ”
• 答案：until • 解析：not until表示“直到……才”用于强调动作发生的时间。
• 题目：She didn't et ______ she ws hungry. 答案：until 解析：not until表示“直到……才”用于强调动作发生的时 间。
高中英语语法强调句的用法优秀公开课课件
3、特殊疑问句的强调句型： 特殊疑问词+ is/ was + it + that+ 其它部分 e.g. Who was it that saved my son last year?
强调宾语
Doctor Li saved my son last year. 强调宾语 1. 陈述句： It was my son that/who was saved by doctor Li last year.
强调句型的判断
• 强调句型的判断 • 把“It is(was) …that/who”去掉，如果剩余 部分句子结构仍然完整，这个句子就是强调句； 如果句子不完整，则不是强调句。 • 如： • ①It is he who often helps me with my English. • • ②It was because of bad weather that the football match had to be put off.
注意：被强调的原因状语从句只能用because引导，
不能用as或since引导
Not until 强调句式
Not ~until
句型为：
It is/ was not until + 被强调部分 + that + 其它部分
【原句】他完成作业之后才睡觉 He didn’t go to sleep until he finished his work. Not until 置于句首 Not until he finished his work, did he go to sleep. 强调句+ not until It was not until he finished his work that he went to sleep.
英语语法课件之强调句_(ppt)
2） ① It was at the theatre _________ Lincoln was murdered. B It was the theatre _________ Lincoln was murdered. C A. which B. that C. where D. the one ② It was our teacher ________did the experiment in the B lab last night. A.whom B. that C. which D. where A ③ It was ten years ago________ Miss Gao returned to China. A. that B. when C. since D. as ④ It was ________ he said ______disappointed A me.(Shanghai'99) A. what; that B.that; that C. what; what D.that; what ⑤ It was for this reason ________ her uncle moved out of C New York and settled down in a small village. (Shanghai 2001, spring) A. which B.why C.that D.how
一，基本结构：
It is(was)+ 被强调部分+ that（强调部分是人时也可用 who/whom） +其他成分 Eg: We elected him monitor at the class meeting yesterday. 主 宾 宾补 地状 时状 It was we that /who elected him monitor at the class meeting yesterday. （强调主语） It was him that /whom we elected monitor at the class meeting yesterday. （强调宾语）
until精讲
Never put off what you can do today until tomorrow. until
今日事， 今日毕
用法解读
until
词性分析 基本用法
特殊用法：强调句型、倒装
辨析until 高考拾萃
与 till / before
词性分析
词义：直到（Up to a specil time or up to the time of a specil event.）
not until 与强调句型
Not until we pointed out their fault did they realize it.
not until与倒装
直到ቤተ መጻሕፍቲ ባይዱ
特殊用法二
结构：Not until ...+助动词+主语+谓语+...
（当Not until位于句首时,句子才倒装。）
例句：
Not until the teacher came in
did the students stop talking.
老师进来学生们才停止讲话。 Not until next week will the sports meet be held. 下周才开运动会。 直到
Einstein almost knocked me down before he saw me.
爱因斯坦差不多将我撞倒才看见了我。
He had measured me before I could get in a word. 我还没来得及插话,他就把我的尺寸量好了。
高考拾萃
I
won't believe you____ I have seen it with my own eyes. A. although B. when C. until D.till I will wait for you ____ you come back. until与till的区别 A. because B. till C. until D. if 在我爸爸回来前,我不会离开这儿. ______________________________________ I won't leave here before my father comes back. 我是不会离开这儿的,直到我爸爸回来. _______________________________________ I won't leave here until my father comes back. until与before的区别
今日事， 今日毕
用法解读
until
词性分析 基本用法
特殊用法：强调句型、倒装
辨析until 高考拾萃
与 till / before
词性分析
词义：直到（Up to a specil time or up to the time of a specil event.）
not until 与强调句型
Not until we pointed out their fault did they realize it.
not until与倒装
直到ቤተ መጻሕፍቲ ባይዱ
特殊用法二
结构：Not until ...+助动词+主语+谓语+...
（当Not until位于句首时,句子才倒装。）
例句：
Not until the teacher came in
did the students stop talking.
老师进来学生们才停止讲话。 Not until next week will the sports meet be held. 下周才开运动会。 直到
Einstein almost knocked me down before he saw me.
爱因斯坦差不多将我撞倒才看见了我。
He had measured me before I could get in a word. 我还没来得及插话,他就把我的尺寸量好了。
高考拾萃
I
won't believe you____ I have seen it with my own eyes. A. although B. when C. until D.till I will wait for you ____ you come back. until与till的区别 A. because B. till C. until D. if 在我爸爸回来前,我不会离开这儿. ______________________________________ I won't leave here before my father comes back. 我是不会离开这儿的,直到我爸爸回来. _______________________________________ I won't leave here until my father comes back. until与before的区别
如何理解not..until结构
I'll follow you until you love me PAPA,PAPARAZZI …… But I won't stop until that boy is mine
I'll follow you until you love me PAPA,PAPARAZZI …… But I won't stop until that boy is mine
is not old until is old
regrets take the place of dreams
The young man did not wake up until the bed had struck the ground.
did not wake until wake
the bed had struck the ground
A Beatles song was always the most popular one until the group's next one came out.
连词 完整的陈述句
until
连词 直到…动作完成（时） up to the time when
until
介词
连词
你真的了解了until？
until
I sometimes stay in bed
until lunch time
直到午饭时间
until
I sometimes stay in bed
until lunch timeh time
N+V…until…
I stay lunch time
此情可待成追忆
所有的结束都是新的开始
N + not V…until… V
until状语从句
真题回顾
1.We will have no water to drink we don’t protect the earth. A.until B.before C. though D.if
(2010,上海,37)
（如果我们不保护地球，我们将没有 水喝。）
2.Bob promise to join in the football match he has to help his parents on the farm. A.if B. as C. unless D. when (2010,安徽，35）
真题
1.Tom knew nothing about it___ his sister told him. A. since B. if C. until (湖南中考）
常考的状语从句主要是， 1. when,while,as,until,not until等引导的时间状从 2. so, that, so（…）that, such（…） that 等引导的结 果状从 3.if，unless等引导的条件状 从
2. I will not go out___I finish my homework. A.until B.while C. since D.but
3. I’ll wait___she comes out. A.whether B.after C.though D.until
if 和unless引导的 条件状语句
A fish dies if you take it out of water. 如果你把鱼拿出水，它就会死掉。
注意 ： 在 if 引导的条件状语从句中， if 条件句可直接放在主句后面，若 if 条件句放句首， 从句后面要加逗号， 和主句隔开。 If I get up late, I will be late for school. =I will be late for school if I get up late. 如果我起床晚了，我就会迟到。
Until的用法
Until用法
老外最喜欢用的表达时间的小词？
•until=till
ห้องสมุดไป่ตู้
Wait till dawn!
Never put off till tomorrow what you can do today.
Time
until
until prep. 直到...为止
主句为肯定句，V为延续性V
Wait until I return.
wait, wait, wait…
You don’t have to wait
until
I return
I’ll love you until I die.
love…
I can’t love you
We keep fighting until the final victory.
Time
until
•I’ll have to wait until I get well
prepared.
高频句
•My dream would never come true
until the moment…
•A.I have bought the car for a year. •B.I have got the car for a year.
高分句
•This problem will not be solved
until people from all parts of the world are aware of the seriousness of it.
ate
I didn’t realize any of this until I was standing alone.
老外最喜欢用的表达时间的小词？
•until=till
ห้องสมุดไป่ตู้
Wait till dawn!
Never put off till tomorrow what you can do today.
Time
until
until prep. 直到...为止
主句为肯定句，V为延续性V
Wait until I return.
wait, wait, wait…
You don’t have to wait
until
I return
I’ll love you until I die.
love…
I can’t love you
We keep fighting until the final victory.
Time
until
•I’ll have to wait until I get well
prepared.
高频句
•My dream would never come true
until the moment…
•A.I have bought the car for a year. •B.I have got the car for a year.
高分句
•This problem will not be solved
until people from all parts of the world are aware of the seriousness of it.
ate
I didn’t realize any of this until I was standing alone.
强调句型的用法总结
It is tomorrow that they will have a meeting in the hall.
二、注意事项： 1.在此结构中, be 动词必须是单数，因为主语是
it . 连接词必须是that（指人时也可以是who/ whom)
2.主谓一致 ：在强调句型中，被强调部分作主语 时，其形式必须与谓语动词在人称和数上保持 一致。
It was in the small house which/that was built with
stones by his father that he spent his childhood.
三、not… until 结构的强调： 强调“not…until”引导的时间状语时，要用“it
is/was not until…that…”结构,that后面的句子要 用肯定式，且须用陈述句语序。
A. that B. since C. when D. while
8.强调句型中的be动词和情态动词的结合。 句式特征: It may be+ 被强调部分+ that …
It must have been+被强调部分+ that … Would/ Could it be +被强调部分+that…?
C .until; when D. when; then
√3.It was ________ back home after the experiment. A. not until midnight did he go
B. until midnight that he didn't go
C. not until midnight that he went
二、注意事项： 1.在此结构中, be 动词必须是单数，因为主语是
it . 连接词必须是that（指人时也可以是who/ whom)
2.主谓一致 ：在强调句型中，被强调部分作主语 时，其形式必须与谓语动词在人称和数上保持 一致。
It was in the small house which/that was built with
stones by his father that he spent his childhood.
三、not… until 结构的强调： 强调“not…until”引导的时间状语时，要用“it
is/was not until…that…”结构,that后面的句子要 用肯定式，且须用陈述句语序。
A. that B. since C. when D. while
8.强调句型中的be动词和情态动词的结合。 句式特征: It may be+ 被强调部分+ that …
It must have been+被强调部分+ that … Would/ Could it be +被强调部分+that…?
C .until; when D. when; then
√3.It was ________ back home after the experiment. A. not until midnight did he go
B. until midnight that he didn't go
C. not until midnight that he went
介词和连词讲解.ppt
在去……的途中
by the way 顺便说一下 They met each other on their way home/to school. 他们在回家(去学校)的路上相遇了。 By the way, who lost the money? 顺便问一下，谁丢了钱？
17．表“用”时“with＋工具、手段”，“by＋交通工 具(单数)”，“in＋语言、嗓音”。
×
Not until two days after earthquake _d_i_d_s_h_e_s_h_e__fo_u(她nd发h现er)hmeor tmhoetrher alive. 解(ffiinn题dd步) 骤a：live
1. 判断句型： Not until 在句首考倒装。 2.回忆结构：Not until 从句+倒装的主倒句装
They taught there during 2005～2008. 他们在2005年至2008年期间在那教书。
The teacher had already started teaching by the time she got to class.
当她到班级的时候老师已经开始讲课了。
6．表地点时，in表示“范围较大的地方”，强调“ 空间”；at表示在“范围较小的地方”，强调“点”。
介词、连词
知识网络
介词的分类方时 地式间 点介介 介词词 词
介词介词短语b动介e＋词词形＋＋容介名词词词＋介词
介词的功能定 表语 语
状语 宾语
并列连词联转合折nei关关th系系er.：：..nabonurd.t.，.，等hnoowt eovnelyr.等..but also...，
因果关系：so，for等
she was Li Yuchun.
until状语从句
2.否定句 not…until… 直到…才… (not 可以用表示否定意义的词代替， 比如 never, nothing, seldom等) 表示某动作一直持续到某时间才开始 （主句的谓语动词是非延续动词） eg：He won’t go to bed till/until she returns.
3（01 上海）You will succeed in
the end______ you give up halfway. A even if B as though C as long as D unless
例句： 1.Unless it rains, I will go home on foot. 如果不下雨，我将走回家。
If I have enough money,
I will travel around the world.
If I study hard,
I will go to a go句用 must/should
If you want go to a good university, you must study hand. 如果你想上好的大学，你必须努力 学习。
The sports meeting won’t be
2.Don't touch the instruments unless the teacher allows you 没有老师的允许，不要乱动仪器。
2.Don't touch the instruments unless the teacher allows you 如果没有老师的允许，不要乱动仪 器。
2.if从句用一般现在时，主句用 may/might/can
If I finish my homework, I can
状语从句公开课 PPT课件
I was walking down the street while I heard someone calling for help. when
3. When 还以引导条件状语从句相 当于if
How can I explain it to you when / if you won’t listen.
4.Adverbial Clauses of Place
(地点状语从句）
5.Adverbial Clauses of Purpose (目的状语从句） 6.Adverbial Clauses of Result （结果状语从句）
7.Adverbial Clauses of Comparison（比较状语从句）
• __C____ it is possible to test this medicine on
• human patients.
• A. since
B. after C. before
D. when
• 3. (06四川)－Why didn’t you tell him about the
• meeting?
4. “趁……”
1. Before they got to the bus stop, the bus had gone. 在..之前
2. It will be 5 years before he returns to his motherland. 多久之后才…
3. We waited a long time before he came out.
（ 让步）
• As he wasn’t ready in time, we went without him. （原因）
• Do as I told you. / do as you like. （ 方式 ）
3. When 还以引导条件状语从句相 当于if
How can I explain it to you when / if you won’t listen.
4.Adverbial Clauses of Place
(地点状语从句）
5.Adverbial Clauses of Purpose (目的状语从句） 6.Adverbial Clauses of Result （结果状语从句）
7.Adverbial Clauses of Comparison（比较状语从句）
• __C____ it is possible to test this medicine on
• human patients.
• A. since
B. after C. before
D. when
• 3. (06四川)－Why didn’t you tell him about the
• meeting?
4. “趁……”
1. Before they got to the bus stop, the bus had gone. 在..之前
2. It will be 5 years before he returns to his motherland. 多久之后才…
3. We waited a long time before he came out.
（ 让步）
• As he wasn’t ready in time, we went without him. （原因）
• Do as I told you. / do as you like. （ 方式 ）
not_until的用法大全
Was it not until he finished his homework that he went to bed?
→
【结论】强调句的一般疑问句形式：Is / Was it ＋ 被强调部分＋ that＋句子的其余部分。
Practice： 1.I didn’t notice it until yesterday.(变成强调句)
他们后面可以接时间点，也可以接时间状语从句。
Practice：translation
1.直到我回来你才可以离开。 2.她一直等到了八点钟。 1.You can’t leave until I come back.
2.She waited until 8:00. Not… until“直到…才”表示在这个界限之前一直 没有发生这个动作。
Until “直到…时”表示这个动作一直延续到这个动 作出现时。
Not until 用于强调句型中。
【例句观察】 He didn't go to bed until he finished his homework. (对画线部分进行强调)
→ It wasn't until he finished his homework that he went to bed. (强调句)
【结论】not …until …结构用于强调句中，not 要提 前 到 until 之 前 ， 放 在 be 动 词 后 。 即 ： It wasn't until …that ＋句子的其余部分。
【例句观察】 It wasn't until he finished his homework that he went to bed. (强调句)
Practice：until/ not…until
状语从句完整版ppt课件
While I really don’t like art, I find his work impressive. ( while =_a_l_t_h_o_u_g_h_ )
While there is life there is hope. (while = __a_s_l_o_n_g_a_s_ )
引导词可分为两部分．
as while when whenever before after until (till) since as soon as
every time next time the first/…time the moment the minute/… instantly immediately directly (一…就…)
We clean the classroom before we leave school every day. It will not be long before you regret for what you’ve done. 不久你就会为你的所作所为后悔的。
after引导的时间状语从句
◆ after引导的时间状语从句，常译为“在……之后”， 表示主句的动作发生在从句的动作之后。
while:持续性动词 ／进行时
＊一般或现在情况
e.g. I like listening to music while I am doing my homework.
＊将来情况－V一般现在时或现在进行时
e.g.— I’m going to the post office. -- While you are there, can you get some stamps for me?
I had no sooner begun to talk than he rang off. No sooner had I begun to talk than he rang off. 我还未来得及讲话，他就挂断了电话。
While there is life there is hope. (while = __a_s_l_o_n_g_a_s_ )
引导词可分为两部分．
as while when whenever before after until (till) since as soon as
every time next time the first/…time the moment the minute/… instantly immediately directly (一…就…)
We clean the classroom before we leave school every day. It will not be long before you regret for what you’ve done. 不久你就会为你的所作所为后悔的。
after引导的时间状语从句
◆ after引导的时间状语从句，常译为“在……之后”， 表示主句的动作发生在从句的动作之后。
while:持续性动词 ／进行时
＊一般或现在情况
e.g. I like listening to music while I am doing my homework.
＊将来情况－V一般现在时或现在进行时
e.g.— I’m going to the post office. -- While you are there, can you get some stamps for me?
I had no sooner begun to talk than he rang off. No sooner had I begun to talk than he rang off. 我还未来得及讲话，他就挂断了电话。
时间状语until用法课件
在这等他回来。 Wait here until he comes back. 这个小男孩看到他妈妈之后才笑起来。 The little boy did not smile until he saw his mother.
英→中 • 找到时间点（until….） • 找出动作及not • 有not则为“直到…才…”
在这之前, 扎克并不知道自己对青霉素过敏。
did thereached news reach But not until two weeks later the news Tara. No error A B C D E
不过两星期后这个消息才传到塔拉。
It was not until he gained power that did he show himself in his true colors. he showed A B C D No error 一直到他掌权之后,他才露出自己的真面目。 E
Will you keep on the course of exercises until you are thinner? 你要继续这项训练直到身体瘦下来为止吗 ? The doctor will not permit her up until her leg is better. 在她的腿好些之前,医生不允许她起床。
Not until the sun had set did they stop working. No error A B C D E
直到太阳落山他们才停止工作。
Zach had not, until that time, known about his allergy to penicillin. No error A B C D E
I am away from the office until 2 January. 1月2日之前我都不上班。（不在办公室） I didn’t go to bed until 12 o’clock last night. 我昨晚（直到）12点才上床睡觉。
英→中 • 找到时间点（until….） • 找出动作及not • 有not则为“直到…才…”
在这之前, 扎克并不知道自己对青霉素过敏。
did thereached news reach But not until two weeks later the news Tara. No error A B C D E
不过两星期后这个消息才传到塔拉。
It was not until he gained power that did he show himself in his true colors. he showed A B C D No error 一直到他掌权之后,他才露出自己的真面目。 E
Will you keep on the course of exercises until you are thinner? 你要继续这项训练直到身体瘦下来为止吗 ? The doctor will not permit her up until her leg is better. 在她的腿好些之前,医生不允许她起床。
Not until the sun had set did they stop working. No error A B C D E
直到太阳落山他们才停止工作。
Zach had not, until that time, known about his allergy to penicillin. No error A B C D E
I am away from the office until 2 January. 1月2日之前我都不上班。（不在办公室） I didn’t go to bed until 12 o’clock last night. 我昨晚（直到）12点才上床睡觉。
not-until用法幻灯片
Not until 在倒装句中的运用
倒装结构：Not until +从句 + 倒装的主句
We did not get off the bus until it stopped.
主句
从句
倒装
Not until _it_s_从t_o句_p_p_e_d d_wi_de_w_d_ie主d_g_g句e_et_to_o_ff_ft_thh_e_eb_b_uuss
2.回忆结构：Not until 从句+倒装的主句
did she find her mother alive
2
Not until 用法总结
基本结构： not + 主句+ until + 从句
倒装句结构: Not until + 从句 + 倒装的主句
主倒从不倒
3
4
用not until的三种结构翻译下面的句子
直到她摘掉眼镜，我才认出来她是李宇春。 基本结构
I did not realize she was Li Yuchun until she took off her glasses.
倒装句结构
主句倒装 Not until she took off her glasses did I realize she was Li Yuchun.
×
1例句Βιβλιοθήκη Not until two days after earthquake ____________( 她di发d 现sh)ehefsirnhmdeoftohuenr dalihver. (mfinodth) er alive 解题步骤： 1. 判断句型： Not until 在句首考倒装。
倒装
5
倒装结构：Not until +从句 + 倒装的主句
We did not get off the bus until it stopped.
主句
从句
倒装
Not until _it_s_从t_o句_p_p_e_d d_wi_de_w_d_ie主d_g_g句e_et_to_o_ff_ft_thh_e_eb_b_uuss
2.回忆结构：Not until 从句+倒装的主句
did she find her mother alive
2
Not until 用法总结
基本结构： not + 主句+ until + 从句
倒装句结构: Not until + 从句 + 倒装的主句
主倒从不倒
3
4
用not until的三种结构翻译下面的句子
直到她摘掉眼镜，我才认出来她是李宇春。 基本结构
I did not realize she was Li Yuchun until she took off her glasses.
倒装句结构
主句倒装 Not until she took off her glasses did I realize she was Li Yuchun.
×
1例句Βιβλιοθήκη Not until two days after earthquake ____________( 她di发d 现sh)ehefsirnhmdeoftohuenr dalihver. (mfinodth) er alive 解题步骤： 1. 判断句型： Not until 在句首考倒装。
倒装
5
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倒装句结构
主句倒装
Not until she took off her glasses did I recognize she was Li
Yuchun.
Thank you !
Practice：until/ not…until 1.Will the fish keep ________ tomorrow? 这鱼能搁到明天吗？ 2.She _______ go to bed _______ 11:00pm last night. 3.You can wait here _____ help comes. 你可以在这里等，直到 有人来帮你。 4. I _____ notice it until he told me.
Until 与持续性动词连用， 意思是“直到……时； 直到……为 止” Not …until 与短暂性动词连用，意思是“直到……才” 他们后面可以接时间点，也可以接时间状语从句。
Practice：translation 1.直到我回来你才可以离开。 2.她一直等到了八点钟。 1.You can’t leave until I come back. 2.She waited until 8:00.
2、用It is/was not until 从句 that...结构表示
It was not until __I_b_e_c_a_m__e_m_o_n_i_to_r__o_f _ou_r__cl_a_s_s__ that
_____________________________ I realized the importa考题改编
直到我成为我们班的班长，我才意识到团队合作的重要性。
解题步骤：
1、用not until的基本结构翻译 主句 I did not realize the importance of team work until I became monitor of our class. 从句
一. 强调句练习(优化p7先自学)
eg： I came across one of my old friends in the park last night.
It is I who/that came across one of my old friends in the park last night. It is one of my old friends whom/that I came across in the park last night. It is in the park that I came across one of my old friends last night.
did she find her mother alive
Not until 用法总结 基本结构： not + 主句+ until + 从句 强调句结构：It is/was not until + 从句+that + 主句
倒装句结构: Not until + 从句 + 倒装的主句
主倒从不倒
用not until的三种结构翻译下面的句子
not until的三种用法： 基本结构 强调句结构 倒装句结构
Not until 的基本结构 直到车停了，我们才下了公交车。
We did not get off the bus until it stopped.
主句
从句
基本结构： 主not 句 + until +从句
Not until 在强调句中的运用
直到她摘掉眼镜，我才认出(recognize)来她。 基本结构
I did not recognize her until she took off her glasses.
强调句结构
It was not until she took off her glasses that I recognizeed her.
强调句结构：It is/was not until + 从句 +that +主句
We did not get off the bus until it stopped.
主句
从句
肯定形式
It was not until _it_s_to_p_p_e_d__that _w_e_g_o_t _o_ff_th_e__bu_s_
→ It wasn't until he finished his homework that he went to bed. (强调句)
【结论】not …until …结构用于强调句中，not 要提前到until 之前，放在be动词后。即：It wasn't until …that ＋句子的其余 部分。
Not… until“直到…才”表示在这个界限之前一直没有发生这 个动作。 Until “直到…时”表示这个动作一直延续到这个动作出现时。
Not until 用于强调句型中。 【例句观察】
He didn't go to bed until he finished his homework. (对画线部 分进行强调)
肯定形式
Not until 在倒装句中的运用
倒装结构：Not until +从句 + 倒装的主句
We did not get off the bus until it stopped.
主句
从句
倒装
Not until _it_s_从t_o句_p_p_e_d d_wi_de_w_d_ie主d_g_g句e_et_to_o_ff_ft_thh_e_eb_b_uuss
×
高考链接
Not until two days after earthquake ____________ di(d她s发he现f)ind shheefromunotdhehrear lmiveo.th(feinrda)live 解题步骤：
1.判断句型： Not until 在句首考倒装。 倒装
2.回忆结构：Not until 从句+倒装的主句
【例句观察】 It wasn't until he finished his homework that he went to bed. (强调句)