答案B?？疾橘e語從句中時態(tài)兼語態(tài)。“找零”動作發(fā)生在“離開”之前，故用完成時。
[備考啟示] 現(xiàn)在完成時表示某個動作或過程在過去某個時間已經(jīng)開始，現(xiàn)在已經(jīng)完成或可能繼續(xù)延續(xù)下去。
2.過去完成時
[例8] Father _____for London on business upon my arrival, so I didn’t see him
A. has left B. left
C. was leaving D. had left
答案D。父親去倫敦出差這一動作在我去看他之前已經(jīng)發(fā)生，故我沒見著他。
[備考啟示]某個動作或過程在過去的過去已經(jīng)完成，與現(xiàn)在沒有聯(lián)系。
3.將來完成時
[例9] By the time Jane gets home, her aunt _____for London to attend a meeting.
A. will leave B. leaves
C. will have left D. left
答案C。等Jane回到家，她姑媽已離開去倫敦開會了。描述將來某一時刻前已完成的動作。
[備考啟示]將來某一時刻前已完成的動作或過程用將來完成時。
五、一般現(xiàn)在時
[例10] The father as well as his three children ____skating on the frozen river every Sunday afternoon in winter. (遼寧2006NMET)
A. is going B. go
C. goes D. are going
答案C。描述現(xiàn)在習慣性動作使用一般現(xiàn)在時；此題還涉及主謂一致。
[備考啟示]一般現(xiàn)在時表不受時限的客觀存在、現(xiàn)在習慣性動作及現(xiàn)在狀態(tài)或瞬間動作。
[備考啟示] 現(xiàn)在完成時表示某個動作或過程在過去某個時間已經(jīng)開始，現(xiàn)在已經(jīng)完成或可能繼續(xù)延續(xù)下去。
2.過去完成時
[例8] Father _____for London on business upon my arrival, so I didn’t see him
A. has left B. left
C. was leaving D. had left
答案D。父親去倫敦出差這一動作在我去看他之前已經(jīng)發(fā)生，故我沒見著他。
[備考啟示]某個動作或過程在過去的過去已經(jīng)完成，與現(xiàn)在沒有聯(lián)系。
3.將來完成時
[例9] By the time Jane gets home, her aunt _____for London to attend a meeting.
A. will leave B. leaves
C. will have left D. left
答案C。等Jane回到家，她姑媽已離開去倫敦開會了。描述將來某一時刻前已完成的動作。
[備考啟示]將來某一時刻前已完成的動作或過程用將來完成時。
五、一般現(xiàn)在時
[例10] The father as well as his three children ____skating on the frozen river every Sunday afternoon in winter. (遼寧2006NMET)
A. is going B. go
C. goes D. are going
答案C。描述現(xiàn)在習慣性動作使用一般現(xiàn)在時；此題還涉及主謂一致。
[備考啟示]一般現(xiàn)在時表不受時限的客觀存在、現(xiàn)在習慣性動作及現(xiàn)在狀態(tài)或瞬間動作。