Signaalwoorden present perfect
Belangrijke signaalwoorden om uit je hoofd te leren;- since, for, just, ever, never, yet, already, so far, up till know, (for)how long, lately?
•	How long have you been here?
•	Have you read any good books lately?
•	He has never had a date with her.
•	So far, I haven’t heard from him.