Tom dün gece partiye gelmiş olabilir ama onu orada görmedim.
- Tom may have been at the party last night, but I didn't see him there.
Tom buraya gelmiş olabilir.
- Tom may have been here.
Williams: She has been around. She has met world leaders.
... We have been working on something that we believe ...
... that have been done in the last two or three years using ...