When using 還 to indicate "return", use the following pattern:
S + 還 + (sb.) + sth.
e.g. 我還他畫報
你還丁云的車。(Notice here sb. is omitted.)
This pattern is /only/ used for simple objects, i.e. the object to be returned is not a complex one such as 她媽媽的日本車, etc. Notice in the second example above, sb. is omitted because it would be awkward to say 你還丁云丁云的車, although grammatically it is correct. We will later learn the ways to express something more complicated.