How would you say something like, You seem to be doing great or, You look tired -?
How about, looking good or, seems like a good option -?
I remember always getting stuck when trying to express - to seem, to appear.
Then I discovered two things:
1- You don't have be so literal when translating into Portuguese.
2- The verb PARECER
It's really important that you can quickly come up with a reasonably good way to say these things. The best way is to look at some examples of common situations.
Don't tell someone that they seem beautiful. Say that they are beautiful!
The past participle of PARECER is, PARECIDO(a).
When something looks like something else it's parecdio(a). The gender ending must agree with the subject, of course.