 |  | | Prepositions | | | | Prepositions indicate relationships between words or ideas. Most prepositions deal with location and are easy to learn. Some prepositions, however, have more than one meaning and can be very confusing. Generally, in, on and at indicate location. To and from imply movement toward or away from something. However, to can also function as part of an infinitive. To and for can introduce indirect objects. For and since can also indicate duration. Of is used in partitives (all of, some of . . .) and other expressions. Many prepositions are also used in expressions. | | | | |