Can anybody have thought

[Lucretia]

Hello,
Please, are these sentences correct and do they sound normal?
1.Can anybody have thought the team would win?
2. Since when have you been here? (= since what time)

Thank you.

[Mister Micawber]

.
Yes both sound fine.
.

[Lucretia]

Long time no see. Thanks, Mister Micawber.