Question

necesito saber la diferencia de past participle y el past simple

Answer 1

The Simple Past (or Past Simple) is a tense. For example, I walked to the cinema; She ate some chocolate; They told me to go away; We spoke to the teacher about our problems; You had a cold last week; They talked about the new movie.
Those are all simple past verbs. As you see, they can be formed simply by adding -ed (walk/walked; talk/talked), or they can be irregular like ate, told, spoke, had.

The Past Participle is used to form other tenses such as the Present Perfect (I have been). Often it looks exactly like the Past Simple, ending in -ed; but with irregular verbs it's often totally different. For example:
I like chocolate (Present); I liked chocolate (Simple Past); I have liked chocolate for years.
That was a regular verb, and the Past Participle is identical to the Simple Past.
Now, with a couple of irregular verbs:
I eat chocolate (Present); I ATE chocolate (Simple Past); I HAVE EATEN chocolate for years (Present Perfect). The past participle here is EATEN, from the verb eat, ate, eaten.
I take photos. He TOOK some photos. I''VE TAKEN some photos. Again, Present, Past and Past Participle: take, took, TAKEN.

Some people call the Past Participle "the third part of the verb", and when you look at the examples above you can see why: take, took, taken; eat, ate, eaten; give, gave, given. We use it, as I said, to form other tenses, and also to form Passive Verbs:
Active: The cat ate the rat. Passive: The rat WAS EATEN by the cat.