The document lists various time expressions used to indicate when an event occurs, including parts of the day and year, specific times, periods, frequencies, and specific dates. It provides examples of time expressions using prepositions like "in", "at", and "on" to denote morning, afternoon, evening, months, seasons, hours, weekends, nights, periods like Christmas and Easter, frequencies like daily, weekly, and monthly, and upcoming or specific dates.

1. TIME EXPRESSIONS
-In the morning
-In the afternoon
-In the evening
-In March
-In January
-In summer
-In winter
-At three o'clock
-At midnight
-At the weekend
-At night
- Tonight
-Periods: -At Christmas
-At Easter
- At 9am
-Every day
-Every week
-Every Saturday
-Once a day
-Twice a week
-Three times a month
-Next week
-Next day
-Next
-On my birthday
-On Christmas day
-On 23rd May
-On Wednesday
-On Monday morning
IN
AT
EVERY
ONCE A
TWICE A
3 TIMES A
NEXT
ON