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1，ONCE是什么 意思

1次

ONCE是什么意思

2，once是什么意思

僅一次，一次！曾經，一旦……就

一次

once是什么意思

3，once在醫學上是什么意思

大概意思是：每天一次！

每日一次再看看別人怎么說的。

once在醫學上是什么意思

4，once中文是什么意思

once英 [w?ns] 美 [w?ns] adv.一旦;曾經;一次，一趟;一倍conj.一旦…就…;一經n.一次，一回

做副詞，是：1.一次如：he eat an apple once a day 他一天吃一個蘋果 2.曾經如：he once was a teacher 他曾經是個老師做連詞，是：一……就…… 如：i will tell you once i know 我一知道就告訴你

5，once 是什么詞都怎么用

once 是一次的意思，例：I play game once a week。翻譯：我一個星期玩一次游戲機。

1、副詞（adv.）曾經2、名詞（n.）一次3、連詞一旦

定語從句一、考點聚焦1、功能：相當于形容詞，修飾名詞或代詞，在句中作定語2、位置：定語從句置于被修飾詞之后 Those who are willing to attend the party, sign here please. 3、先行詞：被定語從句修飾的詞稱為先行詞（1）先行詞一般是名詞和不定代詞，如:some-, any-, every-和no與-boy, -thing的合成詞；或all、none、any、some、that、those等代詞。數詞也可以作先行詞，人稱代詞也同樣可作先行詞。（2）先行詞與關系詞是等量關系。必須注意兩點：①先行詞在從句中作主語時，從句謂語動詞的數由先行詞而定。This is the place which is worth visiting.②關系詞在從句句子中充當了成分，其意思就是先行詞的意義，所以在從句中不能重復其意。There are many places we can visit（them）in China.4、關系詞：引導定語從句的都稱關系詞關系代詞：who, whom, which, that, whose, as。關系副詞：when, where, why。that偶爾也作關系副詞。5、確定關系詞的步驟（1）先找關系詞，看先行詞指的是什么。（2）看關系詞在從句中所充當的成分。6、在定語從句中，當先行詞指物時，下列情況的關系詞宜用that而不用which（1）先行詞被①形容詞最高級 ②序數詞 ③數詞幾種詞修飾或被 ④only、any、few、little、no、all、one of等修飾時。（2）先行詞為all、much、little、none、few、one、something、anything等不定代詞時。（3）先行詞中既有人又有物時。He was looking pleasantly at te children and parcels that filled his bus.（4）先行詞在主句中作表語關系詞在從句中作表語時。The village is no longer the one that was 5 years ago.（5）當主句中含有疑問詞which時。Which are the books that you bought for me ?7、宜用which而不用that的情況（1）在非限制性定語從句中（2）在關系詞前有介詞時（3）當先行詞本身是that時（4）當關系詞離先行詞較遠時8、關系詞who與that指人時，也有不同情況分別用不同的關系詞（1）當主句是there be句型時，關系詞用who。（2）先行詞是為anyone、those、someone、everyone、one等詞時，關系詞用who。（3）當主句是who作疑問詞時，關系詞用that。Who is that girl that is standing by the window?（4）whom在從句中只作賓語，可被who取代。9、whose作關系詞既指人又指物，在從句中作定語。如：Do you know Mr.Smith whose story is very moving ?There is a room, whose window faces the river.There is a room, the window of which faces the river.10、關系代詞as,在從句中作主語、賓語和表語。（1）先行詞被such和the same修飾，或句型as many（much）中，從句都用as 引導。Such books as you bought are useful.The school is just the same as it was 10 years age.注意：區別①such … that … 引導的結果狀語從句。They are suchlovely children that we love them much.②the same … that … 引導定語從句。I want to use the same tool that you used just now.（2）無先行詞的定語從句用as和which引導。區別：①意義上：as 含有“這點正如……一樣”。②位置上：as 從句可置句首，也可在另處。He didnt pass the exam, as we had expected.There is lots of air in loose snow, which can keep the cold out.As is known, the earth is round, not flat.11、關系副詞when與where、why、thatwhen 指時間 = in / at / on / during whichwhere指地點 = in / at / from / whichwhy指原因 = for which當先行詞為way、day、reason、time時，可用that作關系副詞。（非正式場合）I dont like the way that / in which / he talks.當time作先行詞時，關系詞可以省掉。This is the first time I have given you a lesson in French.12、必須注意的問題（1）關系詞作主語時，從句中謂語的數。（2）注意區別定語從句與強調句。①定語從句中關系詞作從句成分，復合句。②強調it無意義，that / who不是引導詞。③強調it is / was和that / who后如果句子意思講得通則是強調句，講不通則不是。It is the museum that / which we visited last year.(定語從句)It was in the hotel that we stayed last night.（強調句）（3）定語從句與同位語從句的區別。①定語從句引導詞被稱為關系詞，that充當主語、賓語、表語。有時可省略。②同位語從句引導詞被叫做連詞，that不能充當任何成分，不可省。Word came that their army was defeated.(同位語)We expressed to them our wish that was the same as their.(定語)（4）關系詞在從句中省略的情況。①關系詞作賓語，前無介詞時。②關系詞作表語。（5）限制性定語從句與非限制性定語從句的翻譯。（6）關系詞前有介詞或復雜介詞，關系詞只能是which和whom。（7）幾個特殊的定語從句句型：①He is the only one of the students who has got very good marks in the match.（句中one為先行詞）He is one of the students who have got good marks in the match.（句中students為先行詞）②Is this place the one (that) we visited yesterday?Is this the place(that / which)we visited yesterday ? ③He stood at the window, from where he could see what was happening.④It may rain, in which case the match will be put off.

ad.1. 一次,一回2. 昔日,曾經n.1. 一次,一回conj.1. 一旦,一經...便