at ,in and on kaise jaane ki kaun sa kanha use karna hai

at- kisi jagah par hona batata h. for ex.she is at home. in- kisi jagah vastu ke under ki stithi batata h . for ex.children in classroom. on- kisi vastu ke uper kisi cheej ka hona batata h. for ex. flower pot is on the table. i think it will help you.