Dear Yong Peng,
> 4. She went to school with her sister.
> saa / agami / paa.thasaalaaya.m / bhaginiyaa saddhi.m
> Saa tassaa bhaginiyaa saddhi.m paa.thasaalaaya.m agami.
paa.thasaala.m. When a verb indicates motion to or towards
something, its object should be accusative.
Atha kho Jiivako Komaarabhacco raajaana.m Pajjota.m sappi.m
paayetvaa, *hatthisaala.m gantvaa*, Bhaddavatikaaya
hatthinikaaya nagaramhaa nippati.
Then Jiivaka Komaarabhacca, having made King Pajjota drink
the ghee, *having gone to the elephant stall*, hurried out of
the city on the she-elephant, Bhaddavatikaa.
(Vin. Mahaavagga 207)
Best wishes,
Dhammanando