Re-write the following sentences according to the instructions given after each. Make other changes that may be necessary, but do not change the meaning of each sentence.
Since her childhood, Meera has been good in Mathematics. (End: .................. childhood)
Topic: Transformation — since to for
Answer
Meera has been good in Mathematics since her childhood.
The instruction specifies only where the sentence must END, so the transformation is a REARRANGEMENT: the adverbial phrase moves from the beginning to the end.
Nothing else changes. The tense stays present perfect ("has been"), and "since" remains — it is still a point in time.
Note the punctuation: when "Since her childhood" opens the sentence it is followed by a comma; when it moves to the end, no comma is needed.
INSTRUCTIONS OF THIS KIND — "End: ..." rather than "Begin: ..." — are worth reading carefully. They tell you the last words of your answer, so work BACKWARDS from them, and they often require nothing more than reordering.