Chapter 1 時態 - Ian-Liu-1990/English GitHub Wiki

假設語氣

1. 未來假設 : If + 主詞 + should + 原動, S + will/can/may/should + 原動

   • If it should snow tomorrow, I will stay indoors

2. 過去假設 : If + 過去動詞/beV改were, S + would/should/could/might + 原動

   • If that TV were cheaper, I would buy it

3. 過去完成 : If + had + Vpp, S + would/should/could/might + have + Vpp