1.I bought a new house, but I _________ my old one yet, so at the moment I have two houses.
#39;t sell??????? C. haven't sold??????????? sell
答案：C.?haven't sold。
B) 表示從過去某時(shí)刻開始，持續(xù)到現(xiàn)在的動作或情況，并且有可能會繼續(xù)延續(xù)下去。此時(shí)經(jīng)常用延續(xù)性動詞。時(shí)間狀語常用since加一個(gè)過去的時(shí)間點(diǎn)，或for 加一段時(shí)間，或by加一個(gè)現(xiàn)在時(shí)間。
2.The conference __________ a full week by the time it ends.
A. must have lasted??? B. will have lasted???? C. would last?????????? D. has lasted
本題考核謂語動詞的時(shí)態(tài)。全句的意思是：“會議從開始到結(jié)束將持續(xù)整整一個(gè)星期?！本渲衎y the time it ends表示動作要延續(xù)到將來某一時(shí)刻，因此要用將來完成時(shí)。答案是B) will have lasted。如果選A)，因?yàn)榍閼B(tài)動詞must后面接動詞不定式的完成時(shí)形式表示對已經(jīng)發(fā)生的事情的一種肯定推測，而本句的時(shí)間狀語是by the time it ends而非by the time it ended，所以犯了時(shí)態(tài)不呼應(yīng)的錯(cuò)誤。Would雖可以表示推測或可能性，但would last不能表示延續(xù)到將來某一時(shí)刻的動作，所以C) would last錯(cuò)誤。因?yàn)镈) has lasted是現(xiàn)在完成時(shí)，表示到現(xiàn)在為止已經(jīng)完成的動作，不能表示延續(xù)到將來某一時(shí)刻的動作，所以也不正確。
注意事項(xiàng)：由于本時(shí)態(tài)是由將來時(shí)和完成時(shí)融合在一起的，所以關(guān)于本時(shí)態(tài)的注意事項(xiàng)，可以參考“一般將來時(shí)”和“現(xiàn)在完成時(shí)”的有關(guān)注意事項(xiàng)。

動詞時(shí)態(tài)能力綜合測試
（ ）1.He often______his clothes on Sundays.
A. washing B. washes C. has washed D. wash

（ ）2.I’m Chinese. Where______from?
A. do you come B. you are coming C. you come D. are you coming

（ ）3.May______to school.
A. never walks B. is never walking C. walk never D. never is walking

（ ）4.We will start as soon as our teacher______ .
A. comes B. will come C. come D. is coming

（ ）5.How long ago______playing football?
A. have you stopped B. had you stopped C. did you stop D. do you stop

（ ）6.It______ hard when I left my house .
A. is raining B. rains C. was raining D. will rain

（ ）7.I think this question______to answer.
A. easy B. is easy C. was easy D. will easy

（ ）8. Don’t talk so loudly . Your father______.
A. sleeps B. is sleeping C. slept D. had slept

（ ）9.How many people does the doctor know who______of the disease (疾病)？
A. are dying B. is dying C. has died D. dies

（ ）10.I______my homework now.
A. finish B. finished C. have finished D. had finished
答案：1. B 2. A 3. A 4. A 5. C 6. C 7. B 8. C 9. A 10. C