---Good evening.I have come to see Miss Mary.---Oh,good evening.I’m sorry,but she is not in.---Good evening.I have come to see Miss Mary.---Oh,good evening.I’m sorry,but she is not in.为什么要用have come

---Good evening.I have come to see Miss Mary.---Oh,good evening.I’m sorry,but she is not in.---Good evening.I have come to see Miss Mary.---Oh,good evening.I’m sorry,but she is not in.为什么要用have come
---Good evening.I have come to see Miss Mary.---Oh,good evening.I’m sorry,but she is not in.
---Good evening.I have come to see Miss Mary.
---Oh,good evening.I’m sorry,but she is not in.
为什么要用have come

---Good evening.I have come to see Miss Mary.---Oh,good evening.I’m sorry,but she is not in.---Good evening.I have come to see Miss Mary.---Oh,good evening.I’m sorry,but she is not in.为什么要用have come
晚上好,我现在来见玛丽女士.
晚上好,对不起,她不在.、
HAVE COME表示已经来到,表示我现在已经来到这里的意思.