VOA慢速英语:Everyday Grammar: Put Prepositions in Their Place

prepositions - n. a word or group of words that is used with a noun, pronoun, or noun phrase to show direction, location, or time, or to introduce an object

direct object - n. a noun, pronoun, or noun phrase which indicates the person or thing that receives the action of a verb

indirect object - n. a noun, pronoun, or noun phrase that occurs in addition to a direct object after some verbs and indicates the person or thing that receives what is being given or done