Submitted by Anne Hodgson on Wed, 14/10/2009 - 10:51.
Thanks for this interesting question. And your analysis is absolutely right. You could say "I've brushed up my dancing skills", but then you'd be done with the learning process, and would be where you want to be. Our dancers, however, are still working on their skills. They are still going dancing regularly. So they are still improving, or still brushing up, those skills. The present perfect continuous expresses that "work is still in progress", as it focusses on the process. The present perfect simple announces that something has been updated, as it focusses on the result.
Das Buch ist mit kleinen Geschichten, Zeichnungen, Kritzeleien, Ratespielen, Witzen und Tipps angereichert, so dass jede Seite mit einer neuen Überraschung aufwartet.
COMMENTS
11. They (brush up; correct tense)
their steps ever since.
Your answer was incorrect.
The correct answer is: have been brushing up
My answer was: have brushed up - so it's obviously a problem of 'simple tense versus continuous tense'... Is it...? Really? Or something else?
Thank you.
K. Flechsig