1Has she ever crossed the Sahara?-Yes, she has.
When did she cross it?-She crossed it in her early thirties.
2Has she ever walked the Great Wall of China?-Yes, she has.
When did she walk it?-She walked it in 1995.
3Has she ever travelled up the Nile?-Yes, she has.
When did she travel it up?-She travelled it up when she was a student.
4Has she ever worked in a restaurant?-Yes, she has.
When did she work in it?-She worked there after she had left the university.