1. After school the students _______ (take) their bags and went home.
2. It often _______ (take) me half an hour _______ (get) to the post office.
3. _______ (be) your friends at school last week?
4. We will go to the movies if it _______ (not rain) tomorrow afternoon.
5. When we _______ (arrive) at the station, the train had already left.
6. Our P.E. teacher _______ (be) in the Party for ten years.
7. I’m sorry _______ (keep) you waiting for so long.
8. The heavy rain stopped us from _______ (go) swimming.
9. I didn’t know she preferred reading to _______ (play).
10. I _______ (put) my keys here just now. But I can’t find them now.
11. Li Lei _______ (carry) water for Aunt Mary at times.
12. Sue _______ (have) supper at half past six every day.
13. She _______ (go) to the cinema with her friends tomorrow evening.
14. Beth isn’t here. She _______ (go) to Beijing.
15. My mother _______ (do) some cooking when I came in.
【答案詳解】
1. took。and連接兩個(gè)并列謂語，后一個(gè)動(dòng)詞用過去式，那么前一個(gè)動(dòng)詞也用過去式。
2. takes, to get。根據(jù)句意“到郵局?；ㄎ野胄r(shí)的時(shí)間”，可確定第一空用一般現(xiàn)在時(shí)，且主語是it，故動(dòng)詞用takes。在句型It takes sb some time to do sth中，第二空用不定式to get。
3. Were。由時(shí)間狀語last week可確定此句用be的過去時(shí)，主語是your friends，為復(fù)數(shù)形式，故用were。
4. doesn’t rain。在時(shí)間狀語從句和條件狀語從句中，如果主句為一般將來時(shí)，從句應(yīng)用一般現(xiàn)在時(shí)代替一般將來時(shí)。
5. arrived。從句意“當(dāng)我們到達(dá)車站時(shí)，火車已經(jīng)離開了”我們可知，主句用了過去完成時(shí)，那么從句則用一般過去時(shí)。
6. has been。動(dòng)作發(fā)生在過去，持續(xù)到現(xiàn)在，這是現(xiàn)在完成時(shí)的一種用法。
7. to keep。在I’m sorry后常接不定式表原因(from www.zkenglish.com)。
8. going。在stop sb from doing sth中，from為介詞，那么動(dòng)詞go應(yīng)用going。
9. playing。根據(jù)句型prefer doing sth to doing sth，我們可知此空用動(dòng)詞的-ing形式。
10. put。根據(jù)句意“我剛把鑰匙放在這兒，但現(xiàn)在找不到了”，我們可確定前句用一般過去時(shí)。put的過去時(shí)仍是put，無詞形變化。
11. carries。從句中的時(shí)間狀語at times(有時(shí))，我們可確定此句的時(shí)態(tài)為一般現(xiàn)在時(shí)。主語為單數(shù)第三人稱，故動(dòng)詞carry變?yōu)閏arries。
12. has。根據(jù)句意和時(shí)間狀語every day，我們可知該句時(shí)態(tài)為一般現(xiàn)在時(shí)，且主語Sue為單數(shù)第三人稱，所以have變?yōu)閔as。
13. will go。根據(jù)句意和時(shí)間狀語tomorrow evening，此句用一般將來時(shí)。
14. has gone。句意為“Beth不在這兒，她去北京了”，如表示“到某地去了”，用have (has) gone to + 地點(diǎn)。
15. was doing。句意為“當(dāng)我進(jìn)來時(shí)，媽媽在做飯”。從句用一般過去時(shí)，主句應(yīng)用過去進(jìn)行時(shí)。
2. It often _______ (take) me half an hour _______ (get) to the post office.
3. _______ (be) your friends at school last week?
4. We will go to the movies if it _______ (not rain) tomorrow afternoon.
5. When we _______ (arrive) at the station, the train had already left.
6. Our P.E. teacher _______ (be) in the Party for ten years.
7. I’m sorry _______ (keep) you waiting for so long.
8. The heavy rain stopped us from _______ (go) swimming.
9. I didn’t know she preferred reading to _______ (play).
10. I _______ (put) my keys here just now. But I can’t find them now.
11. Li Lei _______ (carry) water for Aunt Mary at times.
12. Sue _______ (have) supper at half past six every day.
13. She _______ (go) to the cinema with her friends tomorrow evening.
14. Beth isn’t here. She _______ (go) to Beijing.
15. My mother _______ (do) some cooking when I came in.
【答案詳解】
1. took。and連接兩個(gè)并列謂語，后一個(gè)動(dòng)詞用過去式，那么前一個(gè)動(dòng)詞也用過去式。
2. takes, to get。根據(jù)句意“到郵局?；ㄎ野胄r(shí)的時(shí)間”，可確定第一空用一般現(xiàn)在時(shí)，且主語是it，故動(dòng)詞用takes。在句型It takes sb some time to do sth中，第二空用不定式to get。
3. Were。由時(shí)間狀語last week可確定此句用be的過去時(shí)，主語是your friends，為復(fù)數(shù)形式，故用were。
4. doesn’t rain。在時(shí)間狀語從句和條件狀語從句中，如果主句為一般將來時(shí)，從句應(yīng)用一般現(xiàn)在時(shí)代替一般將來時(shí)。
5. arrived。從句意“當(dāng)我們到達(dá)車站時(shí)，火車已經(jīng)離開了”我們可知，主句用了過去完成時(shí)，那么從句則用一般過去時(shí)。
6. has been。動(dòng)作發(fā)生在過去，持續(xù)到現(xiàn)在，這是現(xiàn)在完成時(shí)的一種用法。
7. to keep。在I’m sorry后常接不定式表原因(from www.zkenglish.com)。
8. going。在stop sb from doing sth中，from為介詞，那么動(dòng)詞go應(yīng)用going。
9. playing。根據(jù)句型prefer doing sth to doing sth，我們可知此空用動(dòng)詞的-ing形式。
10. put。根據(jù)句意“我剛把鑰匙放在這兒，但現(xiàn)在找不到了”，我們可確定前句用一般過去時(shí)。put的過去時(shí)仍是put，無詞形變化。
11. carries。從句中的時(shí)間狀語at times(有時(shí))，我們可確定此句的時(shí)態(tài)為一般現(xiàn)在時(shí)。主語為單數(shù)第三人稱，故動(dòng)詞carry變?yōu)閏arries。
12. has。根據(jù)句意和時(shí)間狀語every day，我們可知該句時(shí)態(tài)為一般現(xiàn)在時(shí)，且主語Sue為單數(shù)第三人稱，所以have變?yōu)閔as。
13. will go。根據(jù)句意和時(shí)間狀語tomorrow evening，此句用一般將來時(shí)。
14. has gone。句意為“Beth不在這兒，她去北京了”，如表示“到某地去了”，用have (has) gone to + 地點(diǎn)。
15. was doing。句意為“當(dāng)我進(jìn)來時(shí)，媽媽在做飯”。從句用一般過去時(shí)，主句應(yīng)用過去進(jìn)行時(shí)。