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PREPOSITIONS
Prepositions link their objects to the
other structures within the sentence.
They are used to show placement, time,
direction, cause, and location. They can
be used alone or in two- or three-word
combinations. Unfortunately,
prepositions are often used idiomatically
and often ignore rules. Therefore, their
use must be memorized. There are,
however, a few rules that will help you.
PATTERNS TO REMEMBER
At is used for a specific time.
INCORRECT [We will convene to 10
A.M.]
CORRECT We will convene at 10
A.M.
On is used for a specific day.
INCORRECT [The deadline is at
Friday.]
CORRECT The deadline is on Friday.
In is used for a specific city.
INCORRECT [She was born at San
Francisco.]
CORRECT She was born in San