介绍:
现在完成时的句子：
1. I have finished my homework. （我已经完成了我的作业。）
2. She has read many books. （她已经读了很多书。）
3. They have visited that museum before. （他们以前参观过那个博物馆。）
4. We have lived in this city for five years. （我们在这个城市已经住了五年。）
5. He has learned English since he was eight. （他从八岁起就开始学英语了。）
6. The company has developed several new products. （这家公司已经开发了几款新产品。）
7. You have changed a lot. （你已经改变了很多。）
8. My parents have traveled to many countries. （我的父母已经去过很多国家。）
