PREPOSITIONS

I'll finish today writing some explanation about prepositions. Many of you have asked me about them. I can see they need a bit more of explanation:
Space Expressions

1) We use the preposition in to indicate something physically inside a place.

• See you in the classroom!
• I like swimming in the sea.

2) We use the preposition on to indicate the position on a surface of something.

• Your mobile is on the television.
• I like surfing on the waves.

3) We use the preposition at to indicate a reference point.

• See you at the Cinema Luxor.
• They have a little house at the end of the street.

Time Expressions

1) We use the preposition in for years, seasons, months and moments of the day.

in	the twentieth century
	1987
	the 1880s
	spring/ summer
	the morning/ the evening
	October

- I usually go to Sardinia in the summer.

2) We use the preposition on for completed dates, days of the week, holiday days.

on	21 April
	Christmas Day
	Sunday
	Saturday night

- I often stay with my parents on Christmas Day.
- We usually play tennis on Sunday.

3) We use the preposition at for a reference point in time.

at	six o'clock
	weekends
	night

- See you at ten o'clock near the school.
- What do you usually do at night?