【momou】評論
「過去事實相反」的假設語氣if+主詞+had+P.P….,主詞+ would/should +have+P.PIf I had had enough time, I would have gone with you.假如當時我有足夠的時間,我會和你去。Re:http://www.demo.english101.com.tw/G002/Mood_3_1.htm