present perfect = vtt (voltooid tegenwoordige tijd)
use: start in past but still an effect in present
signal words FYNE JAS (for, yet, never, ever, just, already, since)
( nóóit met een tijdsbepaling zoals last year, in 2001 want dan is het past simple!!)
form: to have + past participle (voltooid deelwoord = verb 3, dus 3e vorm van het werkwoord)
I have walked for hours / He has never seen a blue cat.
- vragend:
Have I walked? / Has he seen?
- ontkennend:
I haven't walked / He hasn't seen