It being fine yesterday, we went on a picnic.此句being的文法觀念為何？

"being"是分詞, 這是分詞構句的結果, 為了避免dangling participle的文法錯誤, 原子句的主詞"it"要留下, 成為一種叫absolute phrase的片語
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原句:  It was fine yesterday, so we went on a picnic.
另例: There being no further business, the meeting was adjourned.

還原本句為It was fine yesterday, we went on a picnic.因為It being fine yesterday為分詞構句修飾其後主要子句，其中因主詞不同it不能省略，若主詞一致就可省略，例Being closed yesterday,the park was cleaned up.

an absolute phrase:-
When weather means conditions at a specific time with reference to sunshine, use go out in all kinds of weather.
When using it=the weather,try use it is fine today.(1)It being fine, we'll go on a picnic.(2)Fine being the weather, we'll go.(3)Weather being fine, kk will go on a picnic.
In (1) the original sentence "IT" is different from main word "we",being inconsistent=not to be omitted.----an absolute phrase construction.

結論是：這句是錯的，應該是 It was fine yesterday。
或者 It was being fine yesterday.

他省略be動詞 用being表示；
整句在強調天氣真的很好 .
而it was fine yesterday 也行.
◇希望有幫上忙

天氣不能用being ，應該寫it was fine yesterday 

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