1. He has finished his work. (“现在完成时” 的影响性用法)
2. He has taught in our school for 30 years.(“现在完成时” 的非终止式用法)
3. This is the best movie I have ever seen.(“现在完成时” 的经历用法)
最后这个是暂时的名称,意思明白即可。所谓 “经历用法”, 是指一个人一生的经历。又如:
I have been to your school before. 以前我曾去过你们学校。
It's the first time I've visited the Great Wall in my lie. 这是我一生中第一次参观长城。