A. Wallwork,
English for Academic Research Grammar Exercises,
DOI 10.1007/978-1-4614-4289-9_7, © Springer Science+Business Media New York 2013
7.1 past simple, present perfect 1 1. I have been there two weeks
ago / before .
2. They have
come back this morning / just comeback bi .
3. We’ve done two exercises so far / this week .
4. They’ve emailed five times yesterday / in the last three hours .
5. They haven’t done it last week / still haven’t done it .
6. They have worked here in 2012 / since 2012 .
7. She has been a professor for many years / in 2008 .
8. They have won all their matches last season / this season .
9. Were you ever in Mongolia / in Mongolia for your holidays ?
10. Have you seen her today / yesterday ?
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