I have always found reflexive, pronominal, and reciprocal verbs challenging to understand and use. An example of a verb that has both a pronominal and non-pronominal form is parecer. Parecer means to appear, to seem, to look. The pronominal form of the verb – parecerse – means to appear alike, to seem alike, to look alike. Notice the use of the pronominal and non-pronminal forms of these verbs in the following sentences:
Tú pareces cansado.
Samuel se parece a Simón.
I have created a booklet of handouts and worksheets to practice the use of reflexive, pronominal, and reciprocal verbs which is available at Teachers Pay Teachers.
Here is a sample of the booklet.