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Hi,

I have problem creating reports for my laboratory subject. It seems that everytime I create a report, our instructor always find error in my grammar. See sample below...

My report: The controller board, with the new supervisory chip, can operate at ~+4.85V (but with VccWarn indicator ON) unlike when it still has its original supervisory chip where it resets and becomes erratic at ~+4.9V.

My instructor's corrections: The controller board, with the new supervisory chip, can operate at ~+4.85V (but with VccWarn indicator ON) unlike when it still had its original supervisory chip with which it reset and became erratic at ~+4.9V.

Can someone help me understand why the grammar in my initial report is wrong?

TIA,

Henry
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Your version is wrong in your usage of "where." Study that. You don't say "where" when you mean "in which case." That's non-standard English.

Your instructor's version is wrong IMO in using the simple past. It should use the simple present as it's something which regularly STILL occurs IF that chip is present.

However, if one wants to point to a situation which occurred exclusively in the past, his/her version is correct.
Comments  
Thanks, Marius.

That makes sense. Usually the outcome in our lab tests are always irreversible. In that case, I'll always use simple past to avoid these kind of hassles. (I was starting to think my instructor has something against me.)Emotion: smile