The most commonly used are in, on, and at.
See the explanation for further information and sample sentences.
As I told my students, to easily remember prepositions, just look at the root word “position/s.” That is a reminder that the basic information about this part of speech is the “position of things” or locators in place and time.
Example:
Some of the commonly used prepositions are *before. after, until, over, throughout, through,underneath, along, across, for, from, between, during, into, and onto. *
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