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(gè)if引導(dǎo)的虛擬條件句，表示與將來(lái)的事實(shí)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(gè)醫(yī)生以幫助這些艾滋病人”。這里的語(yǔ)境是說(shuō)話者知道自己身患絕癥，不可能活很久，與將來(lái)事實(shí)可能相反。此時(shí)，從句中用“were to+動(dòng)詞原形”/動(dòng)詞過(guò)去式/“should+動(dòng)詞原形”；主句中使用“would/might/could/should+動(dòng)詞原形”。