Using Since and For

Examples:
I have been studying English since 1993.
John has helped me since 10:00 this morning.
Those people have been in Europe since August.

Note:  Because we are talking about a time in the past until now, we have to use have/has + past participle when we use since.

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Use for + (a length of time) like 1 day, or 3 hours, or 5 years.

Examples:
I have been studying English for 4 years.
John has helped me for 8 hours.
Those people went to Europe for 2 months.

1.  Leslie has lived here ______ since for ten years.

2.  I haven't seen you ______ since for last March.

3.  We sat and talked ______ since for 30 minutes.

4.  Young-eun studied French ______ since for nine years.

5.  Caroline has been learning Spanish ______ since for March 1999.

6.  We haven't had an earthquake ______ since for 23 years.

7.  I haven't heard from you ______ since for Saturday.

8.  Molly hasn't eaten ______ since for 7:00 this morning.

9.  He played basketball ______ since for over 20 years.

10. Andre hasn't seen Becky ______ since for yesterday.