1.I show you to my office.
> I will show you my office.

2.My grandma brought me up.
> This sentences is correct.

3.I am going to a pool.
> This sentence is correct.

4.She is a smart.
> She is smart.

5.I'm buying candies.
> This sentence is correct. 

Thank you for making your homework, Elly. Stay positive and always practice making sentences using the words you learned. Have a happy weekend. ^^