My sister has come/has been to London twice.

[Alice Chu]

1) My sister has come/has been to London twice. She will come here next Monday.
Can “has come” be used here?

2) Paul has gone/has been to London once. He will go there next week.
Can “has gone” be used here?

 

[jutfrank]

They're both possible, yes, but would obviously give a different meaning from the alternative option. How do we know which word you mean?

What's the point of your making up these sentence? Are you intending to use them in class?

 

[Alice Chu]

I would like to teach them to my students.
I think “has been” is more natural than “has come/gone”.
Please tell me the difference between them.
Thank you very much for your help and kindness.

 

[jutfrank]

There's not much point in our trying to tell you the difference, in my opinion. Why don't you make it clear to us what exactly you mean, and then we'll tell you how to best say it. Please don't make up your own sentences and then ask us to tell you what you mean.