My Sister Sandra is singing.
My sister is singing.
Sandra is singing. :tick.
All sentences are well-formed. But do they mean the same to you? Not necessarily. If I have one sister, then okay (the two apposed NP's cant have different referents), not otherwise.
≠Teaching should be such that what is offered is perceived as a valuable gift and not as a hard duty
Teaching should be such ... so that what is offered is perceived as a valuable gift and not as a hard duty
- For Teachers