9. Jim isn’t here. He （go）to the library. He （go）there an hour ago. 10. He （travel, never）on把这几道题做出来11. I （buy）the bike two weeks ago. I （have）this bike since the beginning of this month. I
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9. Jim isn’t here. He （go）to the library. He （go）there an hour ago. 10. He （travel, never）on把这几道题做出来11. I （buy）the bike two weeks ago. I （have）this bike since the beginning of this month. I
9. Jim isn’t here. He （go）to the library. He （go）there an hour ago. 10. He （travel, never）on
把这几道题做出来
11. I （buy）the bike two weeks ago. I （have）this bike since the beginning of this month. I （have）it for two weeks.
12. Great changes （take place）in those villages in the last ten years, Great changes （take place, also）in my home－town in the last ten years.
9. Jim isn’t here. He （go）to the library. He （go）there an hour ago. 10. He （travel, never）on把这几道题做出来11. I （buy）the bike two weeks ago. I （have）this bike since the beginning of this month. I
had gone 表示他已经去了图书馆
went 时间点,只能用一般过去时
never travels 表示他一贯不旅游的
has gone, went
has never traveled
He has gone to the library. He went there an hour ago.
10. He never traveled on
goes
went
has never traveled
bought
had
had
taked place
also
9.goes，went
10没看懂。。。
9has gone went 10 has never travelled
9:have gone;went
Have been in强调“过去曾去过”之意，表示经验；have been to的意思是“过去到过而现在已返回”，它强调“最近的经历”；have gone to表示“动作的完成”，强调人已离开说话的地方。
10:has never travelled
11:bought;have had;had
12:have taken p...
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9:have gone;went
Have been in强调“过去曾去过”之意，表示经验；have been to的意思是“过去到过而现在已返回”，它强调“最近的经历”；have gone to表示“动作的完成”，强调人已离开说话的地方。
10:has never travelled
11:bought;have had;had
12:have taken place;also taking place(题错了？）
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had gone 表示他已经去了图书馆
went 时间点，只能用一般过去时
never travels 表示他一贯不旅游的