1.You can get a tutor to help you with your geography.
2.You will\can\could give him a call at seven o'clock tonight.
3.Maybe he should say he is sorry.可以这样吗？ You can get a tutor to help you to study geography.也可以，都可以，你如果把study换成learn更好，learn学会，study学习，不一定学会谢谢选了