Every day he starts work at 8:00am and finishs work at 4:30pm.这句话中work 后面跟at对吗？

Question

Every day he starts work at 8:00am and finishs work at 4:30pm.这句话中work 后面跟at对吗？还是用starts working 8：00 am?还是两种表达方式都对？
我用WORD检查：Every day he starts work at 8:00am and finishes work at 4:30pm. 和 Every day he starts working 8:00am and finishes working 4:30pm.都没有绿色下划线出现，是不是表示这两种表达方式都可以呢？

Answer 1

必须有at 后面那句不对
at是介词，在句中连接时间名词，作为时间状语

Answer 2

要用at 在几点要用 at

Answer 3

对