by abemartin87 Sat Aug 06, 2011 8:42 pm
Where cannot be used to modify "metaphorical" place, such as condition, situation, case, circumstances, or arrangement.
"Where" can only modify physical locations!!
Ex1. "The atom is in an unstable condition where it will undoubtedly explode."
This example is wrong. The underlined portion ought to be "in which", because "where" is incorrectly trying to modify the current state of the atom, which is "unstable".
Ex2. "The happiness John experienced yesterday was one where it could not be expressed."
Here in this example "where" is being used modify "happiness", which is a condition/state.
Ex3. "The White House situation room is a place where the President and his immediate cabinet can meet, during times of emeregency, to discuss prevailing matters.
Do you see? In this sentence "Where" is modifying an actual, physical, place in the White House. Here "Where" works correctly.
The same goes with "When". "When" can only refer to points of time.
Ex4. "His studies in archaeology, led John to propose an idea of a time when dinosaurs were around before mammals."
In this example, it would seem "when" is being used to modify "time", one in which dinosaurs roamed the earth, but it is actually trying to modify "an idea", which is not a point in time!!! "an idea" is a concept!! Hence, the sentence ought to read, "...... John proposed an idea in which dinosaurs were around before mammals."