have contributed to NI <from the time when><since> they were sixteen

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JJXR

Senior Member
Russian
Hello to all,

Thanks for reading my post.


Source:

Improve Your Writing skills

Sample sentence:

Most of those who have retired to those who are over forty have contributed to NI <from the time when><since> they were sixteen.

Question:

Are "from the time when" and "since" interchangeable in the above sentence?


Thanks a lot for any comments, corrections or suggestions!

Regards,
JJXR
 
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