"모양이다 and 것 같다"
* ~모양이다:
모양 means "shape", so it can be used to describe a shape. "둥근 모양" (circular shape).
It is also used in the sense of -것 같다, but this usage is a little old fashioned.-
Ex: 비가 올 모양이다 = 비가 올 것 같다. (It looks like it will rain)
* ~것 같다:
"appears to" or "seems to".
It is the most common expression for this sense.