once completed用法和once it completed 的用法··如once published ,the dictionary will be popular可以改成once it published 或者once it is published ```这句子是考查非谓语动词还是时态什么的··求详解

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once completed用法和once it completed 的用法··
如once published ,the dictionary will be popular可以改成once it published 或者once it is published ```这句子是考查非谓语动词还是时态什么的··求详解

没有once it published 这种说法,只能说：once it is published.
once是连词引导一个时间状语从句,表示“一旦……”.
完整的说法是once it is published,the dictionary will be popular.只不过这里it is省略了.
这里考察的是时间状语从句的省略问题.

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如once published ,the dictionary will be popular可以改成once it published 或者once it is published ```这句子是考查非谓语动词还是时态什么的··求详解
答： Once published= Once it is published.
这时考查状语从句的省略。当状语从句中的主语与主句的主语相同或为it, 并且谓语中有be动词时，常可省略主+Be如；When heated, water will become vapour. = When the water heated, ....
If necessary , I will do sth. = If it is necessary , I will do sth.

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once completed用法和once it completed 的用法··如once published ,the dictionary will be popular可以改成once it published 或者once it is published ```这句子是考查非谓语动词还是时态什么的··求详解 once和as long as 的用法区别英语 once和twoice的用法合起来一块说, Once在表示第一次的用法和位置 once 的用法 completed once的含义以及用法. 英语语法：once 和 ever 都表曾经的时候他们的区别和用法是什么? at the moment , at once,right now,right away区别用法和意思。 once和the moment的区别都用一旦的意思,可是用法有什么区别 instantly ,immediately和at once都是立刻,马上的意思,用法有什么区别 homework completed 为什么completed 后置,而用completed homework呢?我说the beautiful girl 和 the girl beautiful in no time和at once的区别in no time和at once都是很快,立即的意思时,用法上有没有什么区别 unless if once用法的区别人名+once用法及意思是什么? once当副词的时候什么用法 reach home 和 arrive at home 两者用法正确吗?例：They_____home______the night of April 7,2002.A.got,in B.reached,onC.arrived,in D.arrived at,on如果是用arrive的话要不要加at?Why? Once ____,this power station will supply all the neighboring towns and villages with electricityA.it being completed B,it completed C.completed D.it completing为什么选C而不选B呢?