in: for months, years, centuries and long periods.
During: We use during +noun to say when something happens.
Until: We use until/till to say how long a situation continues.
From-To: We use from – to +beginning and end of a period.
- I have a class at 9 am.
- In Morocco, it always snows in November.
- Do you study on Mondays?
- Last evening we watched a TV show from 2 to 8 o’clock.
- Let’s wait until he brings the car to the front door.
- They have known each other since they were at the kindergarten.
- I worked with the Japanese partners for seventeen years.
- We met a lot of interesting people during our trip.
When we say last, next, every, this we do not also use at, in, on.
- I went to London last year. (not in last year)
- He’s coming back next Friday. (not on next Friday)
- I go home every weekend. (not at every weekend)
- We’ll call you this evening. (not in this evening)