19.1
1. how long has she been studying Italian?
when did she begin studying
Italian?
2. how long have you known Tom?
when did you first meet Tom?
3. how long have they been married?
when did they get married?
19.2
1. since.
2. for.
3. for
4. Since.
5. for
6. for.
19.3
1. been sick
since Tuesday.
2. married
in 2009.
3. had a
beard for ten years.
4. to France
5. his new
car nine months ago.
19.4
1.No, it's been
six months since I ate in restaurants.
2. No, it's
been years since it snowed here.
3. No, it's been a long time since I went swimming.
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