2). It is wonderful that you should have achieved so much in these years. 這幾年中你們竟然取得如此大的成就，真了不起!（注意這裡主語從句內出現時間狀語in these years，一般要求用現在完成時，而使用should是為了表示驚異、讚歎意味。
句型： If ...were/V-p.t. ..., ...would/might/could/should + 原形V.... （較單純動詞變化）
例1. If I were you, I would be satisfied. (In fact, I am not you.)
例2. If I had money on me, I would take this expensive one.
(In fact, I don't have money with me, so I can't take this expensive one.)
2.
針對過去事件的假設語氣 （過去假設法） （即非過去事實--與過去事實相反）
句型： If ...had + P.P..., ...would/might/could/should + have + V-p.p. .... （完成式動詞變化）
例：If I had been with them, the children wouldn't have been injured.
時間軸圖示 （ 藍色 直線 為正常時式， 粉紅 斜線 為假設語氣）
3.
表對未來之推測、假設 （未來假設法）
A)
should/happen to表“萬一/如果碰巧”：
句型：If ...should/happen to +原形V..., ...will(would)/may(might)/can(could)/should +原形V
例：If there should be strikes, the company will/would lay off the strikers.
例：That's a good idea, but suppose mom were to find out.
註：if-條件句「如果，假如」-- 表事件之條件或可能性。（動詞變化：直說法--時式正常變化）
例1. If it rains heavily, the river nearby floods/will blood. （如果大雨，河流就淹水。）→ 條件，結果。
例2. If she told you that, she was lying. （果真她這麼告訴你，她就是在撒謊。）→ 過去可能的事實。
句型： If ...were/V-p.t. ..., ...would/might/could/should + 原形V.... （較單純動詞變化）
例1. If I were you, I would be satisfied. (In fact, I am not you.)
例2. If I had money on me, I would take this expensive one.
(In fact, I don't have money with me, so I can't take this expensive one.)
2.
針對過去事件的假設語氣 （過去假設法） （即非過去事實--與過去事實相反）
句型： If ...had + P.P..., ...would/might/could/should + have + V-p.p. .... （完成式動詞變化）
例：If I had been with them, the children wouldn't have been injured.
時間軸圖示 （ 藍色 直線 為正常時式， 粉紅 斜線 為假設語氣）
3.
表對未來之推測、假設 （未來假設法）
A)
should/happen to表“萬一/如果碰巧”：
句型：If ...should/happen to +原形V..., ...will(would)/may(might)/can(could)/should +原形V
例：If there should be strikes, the company will/would lay off the strikers.
例：That's a good idea, but suppose mom were to find out.
註：if-條件句「如果，假如」-- 表事件之條件或可能性。（動詞變化：直說法--時式正常變化）
例1. If it rains heavily, the river nearby floods/will blood. （如果大雨，河流就淹水。）→ 條件，結果。
例2. If she told you that, she was lying. （果真她這麼告訴你，她就是在撒謊。）→ 過去可能的事實。
下載 Unit 13.1 同步演練
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