This document summarizes the proper uses of common English prepositions of time and location. It explains the differences between prepositions like "at", "in", "on", "during", "for", "since", "by", "among", "between", "next to", "near", "across", "through", and "along" and provides examples of their correct usage depending on whether referring to a point, line, surface, space, or period of time. Common expressions involving prepositions are also listed.

1. PREPOSTIONS<br />TIME<br />AT: <br />Hours, times: At seven o’clock<br />Exceptions: at weekend, Christmas, Eaters, at night, at first<br />ON:<br />Days of the week, dates: On Monday, <br />Exception: on Monday morning<br />IN:<br />Parts of the day, week, months, years, centuries : In the morning….<br />DURING/FOR/SINCE<br />I have worked there since last month (point)<br />He has worked for several years (period)<br />He worked there during the war (period/moment)<br />for means from the beginning till the end <br /> during means in a moment of this period<br />BY<br />No later than: we will have finished by Monday <br />By day, by night means during<br />PLACE<br /> POSITION<br />IN<br />Three dimensional space: You can use at if you consider it as a point and in if it is as an space: In Paris, At Paris<br />ON<br />Two dimensional: surfaces or lines: On the road, on the border<br />Exceptions: On the left, on television, on the farm, on an island<br />AT<br />One dimension or points At the bus stop, at 7th Church street<br />Exceptions: at work, at school, at home…<br />OFF<br />Opposite of on: He went off the road<br />AMONG/BETWEEN<br />He was among the trees/ He was between you and me<br />NEXT TO/NEAR/ BY/ AT/BESIDE<br />DIRECTION<br />ACROSS/THROUGH/ALONG : Two dimension<br />He went across the road (surfaces)/He went through the door (spaces)<br />EXPRESSIONS<br />BACK ATDEPEND ONFALL OFFLAUGH AT<br />LEAVE FORRESPONSIBLE FORSUFFER FROM<br />