Present perfect or past simple

Man benutzt das Present Perfect, um ein Geschehen auszudrücken, das in der Vergangenheit geschah. Der genaue Zeitpunkt ist nicht wichtig. Folglich sind die Signalwörter: ever, never, once, many times, several times, before, so far, already, yet etc.
Das Simple Past dient dazu, eine Handlung auszudrücken, die in der Vergangenheit abgeschlossen (einmalig oder wiederholt) wurde. In diesem Zusammenhang sind die Signalwörter: yesterday, one year ago, last week, at that moment, that day etc. von Bedeutung.

Choose the present perfect or past simple.

1. I _________________ (see) three police cars this morning.

2. After he _________________ (arrive) home, he _________________
(unpack) and _________________ (go) to bed early.

3. A: What’s wrong?
B: I _________________ (break) a glass!

4. My grandparents only _________________ (know) each other for a few
months before they _________________ (get) married.

5. I _________________ (be) in London for three years.

 
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answers:

<sub>1. I’ve seen three police cars this morning.
2. After he arrived home, he unpacked and went to bed early.
3. A: What’s wrong?
B: I’ve broken a glass!
4. My grandparents only knew each other for a few months before they got
married.
5. I’ve been in London for three years.</sub>