Question

If I _______ long enough to have a job, I _______ choose to be a doctor, helping these AIDS patients.

1. A.
   were to live; would
2. B.
   had lived; would
3. C.
   should live; would have
4. D.
   lived; would have

Answer 1

A
這是一個if引導的虛擬條件句，表示與將來的事實相反，句意為“要是我能活到找工作的年齡，我將選擇成為一個醫生以幫助這些艾滋病人”。這里的語境是說話者知道自己身患絕癥，不可能活很久，與將來事實可能相反。此時，從句中用“were to+動詞原形”/動詞過去式/“should+動詞原形”；主句中使用“would/might/could/should+動詞原形”。