亖呉?盀
in a while一般用於句首、句中還是句末？？還有after a while和for a ...
in a while句末例句：I will leave for Beijing in a while（我馬上就去北京）after a while句首例句After a while,we began to have a picnic。
過不久，我們就開始野餐for a while 也是句末例句I have watched TV for a while（我隻看了一會兒電視）
while的用法
從一道高考題綜述while的用法 先看下麵一道高考題： -I\”m going to the post office. -________you\”re there, can you get me some stamps? A. As B. While C. Because D. If 對連詞的用法考查在每年高考題中均有涉及。
Because引導原因狀語從句， If引導條件狀語從句，按題幹提供的情景均不可取。
While和As都能引導時間狀語從句，極易混淆。
As一般強調主句謂語動詞與從句謂語動詞動作的同時性，而While除可表示同時性外，還含有一個動作在另一個動作正在進行或持續過程中的某一時刻發生。
再從題幹所提供的情景判斷，就可知道B為最佳答案。
while的用法可從下述幾點理解與運用。
一、while意為\＂當......時候\＂，指一段時間，不能用來表示一個時間點。
While the discussion was still going on, George came in. 當討論還在進行時，喬治走了進來。
二、while意為\＂而；然而\＂，表示轉折。
There\”re plenty of rain in the southeast, while there\”s little in the northeast. 東南部雨量充足，而西北部則很少下雨。
三、while意為\＂雖然；盡管\＂，表示讓步。
While I admit his good points, I can see his shortcomings. 盡管我承認他的優點，但我還是能看到他的缺點。
四、while意為\＂隻要\＂，表示條件。
We can surely overcome these difficulties while we are closely united. 隻要我們緊密地團結一致，一定能克服這些困難。
五、while從句中的省略。
當while從句中的主語與主句的主語一致，且含有be的某種形式時，從句中的主語連同be可同時省略。
While listening to the radio, she fell asleep. 她在聽收音機時睡著了。
While in London, he studied music and painting. 在倫敦時，他學習音樂和繪畫。
六、while可用作名詞，意為\＂一會兒；一段時間\＂。
作名詞用時，主要用於短語中： after a while \＂過了一會兒\＂； all the while \＂一直，始終\＂； a short / little while ago \＂剛才\＂； once in a while \＂偶爾，間或\＂； wait / rest(for) a while \＂等 / 休息一會兒\＂。
I haven\”t seen her for a long while.我好久沒有看見她了。
Where have you been all this while？這一陣子你到哪去了？ He usually goes to work by bike, but once in a while he goes by bus. 他通常騎自行車上班，但偶爾也乘公共汽車。
I looked everywhere for the letter, but it was in my pocket all the while. 我到處找那封信，卻不知它一直在我口袋裏。
七、while與when以及as之間的區別。
1. 當從句中的謂語動詞是持續性的動作時，我們可以用while, when或as。
While / When / As I was walking down the street, I noticed a police car in front of the bank.我順著馬路往前走時，發現銀行門前停著一輛警車。
2. 當從句中的謂語動詞表示瞬間動作時，不可用while。
He was on the point of leaving when someone knocked at the door. 他正要走，這時有人敲門。
3. 如果談論兩個長動作，最常用的是while。
While John was sitting biting his nails, I was working out a plan to get us home. 約翰坐在那裏咬指甲時，我想出了一個回家的辦法。
不過， as是可以用來說明兩種正在發展或變化的情況的，這時as引導一個持續性的動作，主句中的動作與之同時進行。
As we talked on, he got more and more excited. 我們繼續往下談的時候，他越來越興奮。
4. 如果表示兩個短動作或事件同時發生，最常用的是as或just as，也可用when。
Just as he caught the ball, there was a tearing sound. 當他抓住球的時候，有一種撕裂的聲音。
I thought of it just when you opened your mouth. 就在你要說話的時候，我也想到了。
求大神解答 在SQL中用while循環做添加語句 做出一個回子
我寫了一個可以實現的效果，你試試CREATE TABLE #T (A CHAR(1),B CHAR(1),C CHAR(1),D CHAR(1),E CHAR(1),F CHAR(1),G CHAR(1),H CHAR(1),I CHAR(1),J CHAR(1),K CHAR(1),L CHAR(1),M CHAR(1))DECLARE @NEXT INT,@NEXT2 INTDECLARE @SQL NVARCHAR(100)SET @NEXT=1WHILE @NEXTBEGIN set @NEXT2=1SET @SQL='INSERT INTO #T VALUES(''Z'''while @NEXT2BEGINIF @NEXT IN(1,13) OR @NEXT2=12BEGINSET @SQL=@SQL+',''Z'''ENDELSE IF @NEXT IN(3,11) AND @NEXT2 NOT IN(1,11)BEGINSET @SQL=@SQL+',''Z'''END ELSEIF @NEXT IN(5,9) AND @NEXT2 NOT IN(1,11,3,9) BEGINSET @SQL=@SQL+',''Z'''END ELSEIF @NEXT2 IN(2,10) AND @NEXT NOT IN(1,2,3,11,12,13) BEGINSET @SQL=@SQL+',''Z'''END ELSEIF @NEXT2 IN(4,8) AND @NEXT IN(5,6,7,8,9) BEGINSET @SQL=@SQL+',''Z'''END ELSEBEGINSET @SQL=@SQL+','' '''END SET @NEXT2=@NEXT2+1END SET @SQL=@SQL+')'execute sp_executesql @SQLSET @NEXT=@NEXT+1END SELECT * FROM #TDROP TABLE #T 效果圖：
任何一個while語句是否都可以用for語句來改寫？任何一個for語句是否...
When和While的區別 ①when是at or during the time that， 既指時間點，也可指一段時間，while是during the time that，隻指一段時間，因此when引導的時間狀語從句中的動詞可以是終止性動詞，也可以是延續性動詞，而while從句中的動詞必須是延續性動詞。
②when 說明從句的動作和主句的動作可以是同時，也可以是先後發生；while 則強調主句的動作在從句動作的發生的過程中或主從句兩個動作同時發生。
③由when引導的時間狀語從句，主句用過去進行時，從句應用一般過去時；如果從句和主句的動作同時發生，兩句都用過去進行時的時候，多用while引導，如： a. When the teacher came in, we were talking. 當此句改變主從句的位置時，則為： While we were talking, the teacher came in. b. They were singing while we were dancing. ④when和while 還可作並列連詞。
when表示“在那時”；while表示“而，卻”，表對照關係。
如： a. The children were running to move the bag of rice when they heard the sound of a motor bike. 孩子們正要跑過去搬開那袋米，這時他們聽到了摩托車的聲音。
b. He is strong while his brother is weak. 他長得很結實，而他弟弟卻很瘦弱。
謂語動詞是與非謂語動詞相對應的概念.兩者都是動詞，但是前者是作謂語成分，後者不能作謂語成分.而謂語成分就是用來說明主語的動作或狀態的，一般由動詞或短語動詞承擔. 比如：我看電視.”看”就是謂語. 你正在上網.”上網”也是謂語. 再舉幾個英語句子吧：I see a girl.我看見一個女孩.”看見””see＂就是這個句子的謂語.而see也是個動詞，所以就叫做謂語動詞.She is very beautiful.她很漂亮.＂is＂就是這個句子的謂語，也是動詞. 從句是指用於複合句中擔當某個句子成分的主謂結構。
雖說從句自身的句子結構是完整的， 但是它不能視為獨立的句子，因為它離開了主語就無法獨立、完整地表達意思。
按其所能表達的意義而言，它相當於一個詞或是一個詞組.例如： 1) Because they talk at home while the television is on , many people think they can talk at movies as well . （狀語從句）許多人在家裏是邊看電視邊談話，所以他們認為在電影院也可以如此。
2) Whether he comes or not doesn't make any difference to me . （主語從句） 他來與不來對我都一樣。
3)There is disagreement among economists about what money is and how money is measured（賓語從句）什麼是貨幣以及怎樣計量貨幣經濟學家之間存有分歧。
4) China is not what it used to be . （表語從句）中國不是它過去的樣子了。
5) Is there any proof that the food of plant differs from that of animals ？ （同位語從句）有沒有什麼證據說明植物性食品不同於動物性食品？ 6) Taxes consist of money that people pay to support their government . （定語從句） 稅款是人們支持政府而交的錢。
如果將上麵的複合句中所有的從句都獨立出來，那將是這樣的： 1) Because they talk at home while the television is on 2) Whether he comes or not 3) what money is and how money is measured 4) what it used to be 5) that the food of plant differs from that of animals 6) that people pay to support their government 我們很容易看出，上麵的所有這些句子既不是陳述句、疑問句，也不是祁使句，更不是感歎句。
也就是說，它們不是獨立的句子；也隻有在附屬於主句後才能獲得意義如下：1）因為許多人在家裏是邊看電視邊談話 2）他來與不來 3）什麼是貨幣以及怎樣計量貨幣 4）它過去的樣子5）植物性食品不同於動物性食品6）人們支持政府而交的上麵的這些句子在我們中文裏如同是人們常說的＂半截話＂；在英文中也就是個＂詞或詞組＂了。
B. 我們雖然說過，從句自身的句子結構基本是完整的，但是它不同於＂獨立句子＂的是--每個從句的最前麵都好象＂戴了頂帽子＂即：從屬關係詞。
由此可以看出，從句的另一個特點是：從屬關係詞總是立於從句之首. C. 從句的再一個特點是：一般說來（除少數倒裝的情況外），從句中的語序應該是正常語序。
D. 關於從句種類的劃分有兩種方法：按從句的詞性劃分和按從句的句子功能劃分。
如果按從句的詞性劃分，從句可分為三種：名詞從句、形容詞從句和副詞從句。
如果按從句的句子功能劃分（也就是按從句在句子中所擔任的成分來劃分），從句可分為：主語從句、賓語從句、 表語從句、同位語從句、定語從句和狀語從句。
其實，這兩種劃分從句的方法在邏輯上是一致的.我們知道，能在句子裏充當主語、賓語、表語和同位語的往往是名詞、代詞等，所以名詞從句涵蓋了主語從句、賓語從句、表語從句和同位語從句。
形容詞和副詞常分別在句中擔當定語和狀語，所以，形容詞從句和副詞從句其實分別是定語從句和狀語從句。
名詞從句名詞從句在句中是一個相當於名詞的主謂結構。
我們在前麵說過，名詞從句含蓋了主語從句、賓語從句、表語從句和同位語從句。
連接這些從句與主句的關係詞主要有三類： 1.從屬連詞：that（無有詞義） ， whether（是否） ，if （是否） 2.關係代詞：who（誰，主格） ， whom（誰，賓格），whose誰的，所有格） ， what（什麼），which（哪個，哪些） 3.關係副詞：...
網上看到一個句子看不懂了,英語大大幫個忙....
after a while 不久，過一會兒 After a while,he was asleep.in a while adv.過一會，過不久 once in a while 偶爾 She haves a headache once in a whilefor a short while 暫時 短短一會兒 The road is closed to traffic for a short while.區別：after a while 可以看做是個時間狀語是某一時間點 after + 一段時間 = 一段時間 + later in a while 通常是 once in a while 的形式 表示not ofte
用括號中的詞連接句子高一英語鏈接教材1....
為你解答.1、Caitlynd (who)was walking ahead of me stopped at once (when) she asw the teenager.2、The only thing Caitlynd noticed about the teenager was a fact (that) is that his arms were full.3、I was busy preparing the traditional Thanksgiving turkey (when) the doorbell rang.4、Come in (and) I'll make you a cup of hot cocoa.5、Let them be for a while, I thought. (in case) I should begin to feel how rich I am.6、（Long before） free plastic bags were banned in China earlier this month, some people had begun distancing themselves from the downsides of modern life.7、（Instead of） joining the race to drive the best car, wear the best clothes, these individuals had decided on a life of ＂voluntary simplicity＂.8、I feel relaxed (when) washing clothes with the music on.
高考英語作文萬能句子
一、英語書信的常見寫作模板 開頭部分： How nice to hear from you again. Let me tell you something about the activity. I'm glad to have received your letter of Apr. 9th. I'm pleased to hear that you're coming to China for a visit. I'm writing to thank you for your help during my stay in America. 結尾部分： With best wishes. I'm looking forward to your reply. I'd appreciate it if you could reply earlier. 二、口頭通知常見寫作模板 呼語及開場白部分： Ladies and gentlemen, May I have your attention, please? I have an announcement to make. 正文部分： All the teachers and students are required to attend it. Please take your notebooks and make notes. Please listen carefully and we'll have a discussion in groups. Please come on time and don't be late. 結束語部分： Please come and join in it. Everybody is welcome to attend it. I hope you'll have a nice time here. That's all. Thank you. 三、議論文模板 1.正反觀點式議論文模板 導入： 第1段：Recently we've had a discussion about whether we should... （導入話題） Our opinions are divided on this topic.（觀點有分歧） 正文： 第2段：Most of the students are in favour of it.（正方觀點） Here are the reasons. First... Second... Finally...（列出2~3個讚成的理由） 第3段：However, the others are strongly against it. （反方觀點） Their reasons are as follows. In the first place... What's more... In addition...（列出2~3個反對的理由） 結論： 第4段：Personally speaking, the advantages overweigh the disadvantages, for it will do us more harm than good, so I support it.（個人觀點） オ 2.“A或者B”類議論文模板： 導入： 第1段： Some people hold the opinion that A is superior to B in many ways. Others, however, argue that B is much better. Personally, I would prefer A because I think A has more advantages. 正文： 第2段：There are many reasons why I prefer A. The main reason is that ... Another reason is that...（讚同A的原因） 第3段： Of course, B also has advantages to some extent... （列出1~2個B的優勢） 結論： 第4段： But if all these factors are considered, A is much better than B. From what has been discussed above, we may finally draw the conclusion that ...（得出結論） 3.觀點論述類議論文模板： 導入： 第1段：提出一種現象或某個決定作為議論的話題 As a student, I am strongly in favour of the decision. （亮明自己的觀點是讚成還是反對） The reasons for this may be listed as follows. （過渡句，承上啟下） 正文： 第2段：First of all... Secondly... Besides...（列出2~3個讚成或反對的理由） 結論： 第3段：In conclusion, I believe that... （照應第1段，構成＂總—分—總＂結構） 4.＂How to＂類議論文模板： 導入： 第1段：提出一種現象或某種困難作為議論的話題 正文： 第2段： Many ways can help to solve this serious problem, but the following may be most effective. First of all... Another way to solve the problem is ... Finally...（列出2~3個解決此類問題的辦法） 結論： 第3段：These are not the best but the only two/ three measures we can take. But it should be noted that we should take action to...（強調解決此類問題的根本方法） 四、圖表作文寫作模板 The chart gives us an overall picture of the 圖表主題. The first thing we notice is that 圖表最大特點 . This means that as （進一步說明）. We can see from the statistics given that 圖表細節一 . After 動詞-ing 細節一中的第一個變化， the動詞-ed+幅度+時間（緊跟著的變化） . The figures also tell us that圖表細節二 . In the column, we can see that accounts for （進一步描述）. Judging from these figures, we can draw the conclusion that （結論）. The reason for this, as far as I am concerned is that （給出原因）. / It is high time that we （發出倡議）. 五、圖畫類寫作模板：1.開頭 Look at this picture./The picture shows that.../From this picture, we can see.../As is shown in the picture.../As is seen in the picture... 2.銜接句 As we all know, .../As is known to all,.../It is well known that.../In my opinion,.../As far as I am concerned,.../This sight reminds me of something in my daily life. 3.結尾句 In conclusion.../In brief.../On the whole.../In short.../In a word.../Generally speaking.../As has been stated...
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