The shi4 de construction is used to emphasize additional information like the place or manner of an action. For instance:
Ni3 shi4 zai4 na2li xu2e de Zho1ng we2n?
Where was it that you studied Chinese?
Wo3 shi4 zai4 da4 xu2e xu2e de.
It was at university that I studied. (forgive the stilted translation)
Now, what if I want to emphasize that I did not study at university? Do I negate the shi4 to become bu2 shi4?
Wo3 bu2 shi4 zai4 da4 xue2 xue2 de.
And how about negating a verb with the experiential marker -guo4? In affirmative form, -guo4 would I think be used as:
Wo3 co2ng qia2n zai4 da4 xue2 xue2 guo4.
Would the negative be as follows (negation of the zai4 state verb)?
Wo co2ng qia2n bu2 zai4 da4 xue2 xue2 guo4.
If both negations are correct, then what is the difference in nuance between the two?
- Wo3 bu2 shi4 zai4 da4 xue2 xue2 de.
- Wo3 co2ng qia2n bu2 zai4 da4 xue2 xue2 guo4.
Does the first emphasize that study did take place, but it was not at a university that it took place – whereas the second emphasizes that a particular experience (that the act of studying at a university in the past) never occurred?