He has to drive his friend
He has to drive for his friend.
Please explain that why preposition is not required at the sentence first.
In the first sentence, "drive" is transitive. "to drive someone" means to drive a vehicle with that person as a passenger. g.
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In the first sentence, "drive" is transitive. "to drive someone" means to drive a vehicle with that person as a passenger. (When this pattern is used, most often there is some other information, such as a destination, e.g. "He had to drive his friend to work".)