Using “in” as a Preposition of Time
“in” is used with;
in a week / in one week / in two weeks / in three weeks, etc.
Example: I will come back in two weeks.
in January / in February / in March / in April, etc.
Example: The election was held in June.
in 1990 / in 2015 / in 1856 / in 1770, etc.
Example: America was discovered in 1492.
in the 1880’s / in the 1950s / in the 70s
Example: My grandfather was born in the 1950s.
in the 21st century / in the 15th century
Example: This company was founded in the 20th century.
- LENGTH OF TIME
in 20 minutes / in one hour / in a few days, etc.
Example: I will be ready in 10 minutes.
- PARTS OF THE DAY
in (the) morning / in (the) afternoon / in (the) evening ( “in” is not used with night )
Example: In the evenings, I like to relax.
in the winter/ in the spring/ in the summer / in the autumn
Example: What time does it get dark in the summer?
- OTHER TIMES
in the future / in the past / / in (my/your, etc) spare time / in the Ice Age, etc.
Example: What do you like to do in your spare time?