Past Simple vs Present Perfect
Past simple (yesterday, last night, in 1945, when I was young)
+ Bevestigend - ww + ed of tweede rijtje
- Ontkennend - Onderwerp + didn't + hele werkwoord.
? Vragend - Did + onderwerp + hele werkwoord?
Present perfect (since, for - have + ww+ed of derde rijtje)
- Ontkennend - Onderwerp haven't + voltooid deelwoord
? Vragend - Have + onderwerp + voltooid deelwoord