Sorry for asking again. I confuse using direct object with Object of preposition.... For example
David pointed at Kyle's bowling ball. (https://www.english-grammar-revolution.com/prepositional-phrases.html)
I know that is right sentence.
But I usually say :David pointed Kyle's bowling ball.
Beause I've thought the bowling ball is receiving the action of the verb;point.
Direct object and object of preposition look like similar to me... Help me...