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1) Which of the following sentences are incorrect? Why ?
1. I was practising the guitar when my friend arrived.
2. I was practising the guitar while my friend arrived.
3. When I was studying for my exam ,my sister was watching a video.
4. While I was studying for my exam,my sister was watching a video.


Răspuns :

When=cand
While-in timp ce
Astfel, dintre primele 2 propozitii prima este corecta.
Dintre 3 si 4 a doua este corecta.