Don’t ring the doorbell. Come right in(to) the house.

To refer to one point in time, use the prepositions "in," "at," and "on."

Use "in" with parts of the day (not specific times), months, years, and seasons. Example: He reads in the evening; The weather is cold in December; She was born in 1996; We rake leaves in the fall.

Use "at" with the time of day. Also use "at" with noon, night, and midnight. Example: I go to work at 8:00; He eats lunch at noon; She often goes for a walk at night; They go to bed at midnight.

Use "on" with days. Example: I work on Saturdays; He does laundry on Wednesdays.

He will be in Toronto for 3 weeks. (He will spend 3 weeks in Toronto.)

She will finish her homework by 6:00. (She will finish her homework sometime between now and 6:00.)

I have lived in Minneapolis since 2005. (I moved there in 2005 and still live there.)

He works part time during the summer. (For the period of time throughout the summer.)

She will graduate within 2 years. (Not longer than 2 years.)

To refer to a place, use the prepositions "in" (the point itself), "at" (the general vicinity), "on" (the surface), and "inside" (something contained).

To refer to an object higher than a point, use the prepositions "over" and "above." To refer to an object lower than a point, use the prepositions "below," "beneath," "under," and "underneath."

To refer to an object close to a point, use the prepositions "by," "near," "next to," "between," "among," and "opposite."

To refer to a location, use the prepositions "in" (an area or volume), "at" (a point), and "on" (a surface).

To refer to a spatial relationship, use the prepositions "above," "across," "against," "ahead of," "along," "among," "around," "behind," "below,"
"beneath," "beside," "between," "from," "in front of," "inside," "near," "off," "out of," "through," "toward," "under," and "within."