————,so we went for a dip in the river after school.

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————,so we went for a dip in the river after school.
A.being hot B,it being hot C.as it was hot D.it was hot
为什么不选C?答案说因为有so 所有需要一个句子,那AS IT WAS HOT不是句子么?as不是有引到原因的、、?

答：从结构来分,句子分为简单句、并列句和复合句.
所谓简单句就是只有一套主谓结构的句子.
并列句是两个简单句用并列连词词and,but,or,so等等并列而成的句子.
复合句由主句+从属连词引导的从句构成.从属连词包括引导定语从句的关系词（关系代词和关系副词）、引导状语从句的连词（有九大类）和引导名词性从句的连接词.
as it was hot,一般归入非限制性定语从句,也可理解为原因状语,故其后应为一主句.但因so为并列连词,则前面应为一简单句.所以本题选D.
一般老师让学生记住：though,but只用其一,because( as,since,for) 和so只用其一.一般不说其中的道理.因汉语常将：虽然.但是.,因为.所以.连在一起用,所以中国学生常常会犯这样的错误而不知.
另外,being hot,和it being hot都是非谓语动词作状语,不是简单句,不能用so将它们并列成一个并列句.如没有so,则B也对.
再问：那没有SO、要不要管B的时态呢？
再答： B不是句子，是非谓语（现在分词），没有什么时态的概念。
再问： 0 0 怎么看是不是非谓语？
再答：答：非谓语动词有三类，两种分法：
一种分法：不定式（to do sth. 等等）、分词（现在分词doing, 过去分词done等等)、动名词（doing 等等），（按其功能分）
另一种分法：to 式，ing式和ed式。
谓语动词，一般现在时，有s形如does, 和原形do
现在进行时有：am/is/are+doing, 等等
being done只是现在分词或动名词的一般被动式，不是现在进行时态的被动，后者是am/is/are being done

it_____ hot,so we went for a swim in the river.和it____ hot,w After a school term"s hard work ,we went to the beach for a After a school-term's hard work.we went to the beach for r__ The river is .(rise) after the rain .So we can't swim in it. We will be late for school.—I'm a( ) so 急 We went to swim in the river in a very hot day.这句错在哪儿? After—(have)my breakfast,I went to school. we plan tofinish the newspaper——.A.in a week B.after a week One morning after he __5__ in this school for a week,he went The river is so deep that the children can't swim in it.—— Teachers often tell us ( ) in the river after school . we live in a beautiful house in front of —— ——a river