What the difference with past tense and past participant tense?

The simple past tense stands on its own: “He rowed the boat”. “She rode the horse”. One word signifies the whole action. A past participle is used with an auxiliary verb, such as “have”: “He has rowed the boat.” “She has ridden the horse.” Note that in the case of the verb “row”, the simple past tense and the past participle are spelt and pronounced identically. For the verb “ride”, the past tense and past participle are different. English verbs are inconsistent like that. The simple past tense, eg “rode”, puts the entire focus of the sentence in the past. The next sentence might begin : “When she arrived at the house…” The past participle with the present-tense auxiliary verb “has” forms the present perfect tense; a tense which, while referring to a past activity, keeps the primary focus in the present. The next sentence might be “he is walking the next stretch of the journey” (verb in present tense). The past tense is a full-fledged verb. The past participle on its own is, technically an adjective. “He has stuffed the pillow.” uses a simple-past-tense verb; “a stuffed pillow” uses the participle as a pure adjective, qualifying the noun “pillow”. This makes sense, as when he has stuffed the pillow, he has (possesses) a stuffed pillow.

right