Jim （）in a factory .He （）there for three years .（work） My mother（）a teacher .She1.Jim （）in a factory .He （）there for three years .（work）2.My mother（）a teacher .She （）a teacher for twenty years .（be）3.The city（）a lot since I came here .（improve）4.My brother liker（）He （）for two hours.（swim）5.A:How long （）you （）in the football club B:For two years.A:When（）you ( ) the English club B:Two weeks ago .(join ,be)6.It（）/（）（）7 years since he came to Beijing（be）

1 works has been working
2.is has been
3.has improved
4. swimming has been swimming
5. have been
did join
6.It（is）/（has）（been）7 years since he came to Beijing（be）

你好

1. works                    have worked

2. is                          has been

3. has been improved

4. swimming                  has swum

5. have            been

   did          join

6. is       has been

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祝你学习进步，更上一层楼！

不明白请及时追问，满意敬请采纳，O(∩_∩)O谢谢~~

works...has worked

is..has been

has improved

swimming...has swum

have...been
did.join

is / has been