1. 1.Prepositions of time
2.Connectors and/but

2. • In: is used for months, years,
centuries and long periods
• At: is used for a precise time
• On: is used for
• days and dates

3. • At:
I have a meeting at 9am
• In:
In England, it often snows in December
• On:
•Do you work on Mondays?

4. • And: is used to join two positive sentences
Example:
I like to eat fruits and do exercise every day.
• But: is used to join a positive and a negative
sentence
Example:
I don’t like to eat pizza but i like to eat
hamburger.