Puzzled by "have gone".

English as a Second Language English Vocabulary, Grammar and Idioms
1

Could you say this in AmEng?

We believe him to have gone to Africa at the time?

2

Sounds fine to me.[YSaerTTEW443543]

TOEFL listening lectures: The professor mentions watermelons as an example of what?[YSaerTTEW443543]