We use since with the starting point. Examples: since January, since Monday, since last year.
We use for with a period of time. Examples: for two hours, for weeks, for ages.
In negative sentences, we can use in and for with the same meaning.
Fill in the blanks with for, since or in.
1. I haven't seen him ............................ months.
Please select 2 correct answers
In negative sentences, we can use for or in to indicate duration.
2. He has been absent ......................... several days.
3. They have lived ............................. their life here.
We do not use for with all.
4. This has been going on ......................... several months.
5. He has been unwell ............................ he moved to the city.
6. Have you been waiting ......................... long?
7. It hasn't rained ........................ months.
8. I have known him ........................ a long time.
9. We have known each other .......................... our childhood.
10. I haven't been to the theatre ........................ ages.
11. She has been acting .......................... she was three.
12. I have been teaching English ........................ twenty years.
Answers
1. I haven’t seen him in / for months.
2. He has been absent for several days.
3. They have lived all their life here.
4. This has been going on for several months.
5. He has been unwell since he moved to the city.
6. Have you been waiting for long?
7. It hasn’t rained in/for months.
8. I have known him for a long time.
9. We have known each other since our childhood.
10. I haven’t been to the theatre in / for ages.
11. She has been acting since she was three.
12. I have been teaching English for twenty years.
