1. check in [登记；报到]
【构成】check[检查；核对]； in[在…里]
【例句】You need to check in at the hotel before 6 p.m. [你需要在下午 6 点前在酒店办理入住手续。]

2. check out [结账离开；检验；合格]
【构成】check[检查；核对]； out[出去；离开]
【例句】They checked out of the hotel this morning. [他们今天早上结账离开了酒店。]

3. check up [检查；核对；调查]
【构成】check[检查；核对]； up[向上；在…之上]
【例句】You’d better go to the hospital to check up. [你最好去医院检查一下。]

4. check into [调查；登记入住]
【构成】check[检查；核对]； into[进入]
【例句】The police are checking into the case. [警方正在调查这个案子。]

5. check off [核对；逐一检查]
【构成】check[检查；核对]； off[离开；去掉]
【例句】Please check off the items on the list. [请逐一核对清单上的项目。]

6. check through [仔细检查；浏览]
【构成】check[检查；核对]； through[穿过；通过]
【例句】He checked through the report carefully. [他仔细检查了这份报告。]

7. double-check [再次检查；复核]
【构成】double[双重的；两倍的]； check[检查；核对]
【例句】It’s important to double-check your work. [再次检查你的工作很重要。]

8. spot-check [抽查；抽样检查]
【构成】spot[地点；斑点]； check[检查；核对]
【例句】The quality control department will do spot-checks regularly. [质量控制部门会定期进行抽查。]

9. credit check [信用审查]
【构成】credit[信用；信誉]； check[检查；核对]
【例句】Before getting a loan, you may need a credit check. [在获得贷款之前，你可能需要进行信用审查。]

10. background check [背景调查]
【构成】background[背景；后台]； check[检查；核对]
【例句】The company will do a background check on new employees. [公司会对新员工进行背景调查。]

11. security check [安全检查]
【构成】security[安全；保障]； check[检查；核对]
【例句】Passengers have to go through security check at the airport. [乘客在机场必须通过安全检查。]

12. health check [健康检查]
【构成】health[健康]； check[检查；核对]
【例句】I have a health check every year. [我每年都进行健康检查。]

13. temperature check [体温检测]
【构成】temperature[温度；体温]； check[检查；核对]
【例句】They did temperature checks at the entrance of the building. [他们在大楼入口处进行体温检测。]

14. document check [文件检查]
【构成】document[文件；公文]； check[检查；核对]
【例句】The customs officer did a document check. [海关官员进行了文件检查。]

15. inventory check [库存检查]
【构成】inventory[存货清单；库存]； check[检查；核对]
【例句】We need to do an inventory check before the end of the month. [我们需要在月底前进行库存检查。]

16. quality check [质量检查]
【构成】quality[质量；品质]； check[检查；核对]
【例句】All products must pass the quality check. [所有产品都必须通过质量检查。]

17. regular check [定期检查]
【构成】regular[定期的；有规律的]； check[检查；核对]
【例句】The machine needs a regular check. [这台机器需要定期检查。]

18. random check [随机检查]
【构成】random[随机的；任意的]； check[检查；核对]
【例句】There will be random checks on students’ bags. [会对学生的书包进行随机检查。]

19. pre-flight check [飞行前检查]
【构成】pre-flight[飞行前的]； check[检查；核对]
【例句】The pilots did a pre-flight check carefully. [飞行员仔细地进行了飞行前检查。]

20. final check [最后检查；终审]
【构成】final[最后的；最终的]； check[检查；核对]
【例句】This is the final check before the project is delivered. [这是项目交付前的最后检查。]