Prepositions of Time and Movement

Front

At

Back

Specific time (e.g., at 5 PM)

Front

On

Back

Days and dates (e.g., on Monday)

Front

In

Back

Months, years, long periods (e.g., in 2020)

Front

Before

Back

Earlier than a time (e.g., before noon)

Front

After

Back

Later than a time (e.g., after lunch)

Front

During

Back

Throughout a period (e.g., during summer)

Front

Until

Back

Up to a time (e.g., until 3 PM)

Front

By

Back

Not later than (e.g., by Friday)

Front

From

Back

Starting point (e.g., from 9 AM)

Front

To

Back

Ending point (e.g., to 5 PM)