installing themes (can't find the parent)

Each time I download a theme…unzip…then look in the theme folder..all I see is the child theme.

Hence every time I upload to my site I have a broken theme.

I don’t see other people with this problem so I presume I am doing something wrong.

Isn’t the parent theme supposed to be in the theme folder with the child theme?

I must be missing something,…plugins I can install…I am using filezilla…but the problem appears before I do the install and after I unzip.

I can’t see where the parent theme is.