重點講解：
1. what if
（用于疑問句句首，尤用于詢問不希望看到的事發生時的結果）如果…怎么辦
eg. What if this doesn't work out?
如果這個不行怎么辦？
eg. What if he was going to die!
如果他快要死了該怎么辦？
eg. What if relations between you and your neighbour have reached deadlock, and their behaviour is still unacceptable?
如果你和你的鄰居已鬧僵了，而他們的行為還是令人難以接受，那怎么辦？
2. in that case
那樣的話；在那種情況下，意同in which case；
eg. In that case you'll have to clear yourself.
那樣，你只得自行辯白了。
hat case it may interest you to know that Miss Woods witnessed it.
你也許對這起襲擊還有些懷疑。那么如果我告訴你伍茲小姐親眼目睹了這起事件，你可能會感興趣。
Members are concerned that a merger might mean higher costs, in which case they would oppose it.
成員們擔心合并會導致成本提高，若是那樣的話，他們將提出反對。