Preliminary expression method
Summary word
The prepositional expression method uses prepositions to describe temporal relationships, usually used in conjunction with time nouns.
Format of time
12 hour system
Divide the morning and afternoon into 12 hours per day using AM and PM.
24-hour system
Using 24 hours as a day, from 0:00 to 23:59, time is expressed in hours and minutes.
Context • Notes on Time Expression
01
Basic knowledge of time
Definition of time units
Second
One of the fundamental units of time, used to measure extremely short time periods.
02
The expression of time
Direct expression method
Summary
The direct expression method is the most common way of expressing time, which directly uses time nouns to represent time.