Present perfect or the simple present
1.Up to now the USA has developed (develop) more advanced technology than any other country. (Grammatik richtig, nebenbei: falsche Aussage.)
4.The Bach Orchestraonlydoesn`t only perform (only+not perform) works by Bach. It has just made (just+make) a CD of music by modern composers.
5.Do you see (you+see) any high-definition TV? Yes. Iamhave attended (attend)several demonstrations lately but in my opinion it doesn`t do(not do) anything to improve the programmes. You only see (see) the same rubbish more clearly.
7.We haveknewknown (know) Sarah since she was a baby but we don`t see (not see) her very often. Unfortunately she works (work) so hard that she never has (have) time for a private life.
Present perfect or the simple past
1.Ididn´t seehave not seen (not see) Bill since he moved (move) to Leeds in 1992.
2.Satellite communication really began (begin) with the launching of Telestar I on July 1962. This was (be) the first satellite that bothhasreceived (receive) andhassent (send) signals.
3.How longdidhave youhavehad (you have) a satellite dish? Oh, we have had (have) it for about a year now. We bought (buy) it from some neighbours when they moved (eigentlich "when they were moving..", aber kein past progressive) (move) to Germany.
4.It is clear that the new office technology did (bin mir nicht sicher, aber ich glaube auch past) (do) nothing to reduce paper use – in fact this has increased (increase) by 600% since the early 70s.
5.I didn´t like (not like) Brenda´s lemon chicken much last night. I think shehasforgot (forget) to put in the lemon juice.
mfg Sebastian
(Signalwörter sind unterstrichen)
http://www.ego4u.de/de/cram-up/grammar/tenses



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