您好，九年级英语一单元的常见短语有：

1. go shopping 购物

2. take a walk 散步

3. have a picnic 野餐

4. go swimming 去游泳

5. play sports 运动

6. visit relatives 探亲访友

7. go on a trip 去旅行

8. do housework 做家务

9. attend a party 参加派对

10. have a barbecue 烧烤

11. go hiking 去徒步旅行

12. watch a movie 看电影

13. listen to music 听音乐

14. read a book 读书

15. go camping 去露营

16. play video games 玩电子游戏

17. go to the beach 去海滩

18. have a sleepover 过夜

19. cook dinner 做晚餐

20. go to the amusement park 去游乐园