華特 啊 唷   偷肯  爾抱what are you  talking about 

天氣不能用being ，應該寫it was 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

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

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.

'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.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.