How long have you learned English?
I have learned English since I came to the school.I have learned English for 3 years.
Have you been to Paris?
No.But I have seen it on the TV.
How many times has he been to Beijing?
Only once.His father brought him to there last year.
so far,since,for,in the past few years,up to now,
till(until)now,recently,for a long time等等
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