主題: If 句型

關於試題:If plans _________ made sooner, Gilbert & Sons would be conducting the feasibility study for the Safeway Water Project by now. (A) were being (B) was being (C) had been (D) have been   [If + S + Ved (過去式)…], S + would/should/could/might + Vrt (原型動詞)…. If子句主要子句 = S + would/should/could/might + Vrt (原型動詞)…[ if + S + V-ed (過去式)…]. 主要子句 If子句   與「過去事實相反」的假設語氣 [If + S + had Vpp(過去完成) …], S + would/should/could/might + have Vpp ….  If子句 主要子句 = S + would/should/could/might + have Vpp … [if + S + had Vpp(過去完成)…].  主要子句If子句