Since используется с указанием точного времени, момента во времени, с которого что-либо началось, как, например: March 31, или 9:19 a.m., или Tuesday.
Например: I have been studying English since 1993. Я изучаю английский с 1993 года. For используется с указанием периода, промежутка времени, в течение которого что-либо совершается, происходит, как, например: 1 day, или 3 hours, или 5 years.
Например: I have been studying English for 4 years. Я изучаю английский 4 года. С предлогом For можно использовать время Past Simple, если действие уже завершилось.
Jane lived in Chicago last year. We worked in that factory in 2005. He didn't plant trees in his garden last week. Did she listen the music? We looked at her. They watched TV last night. He wrote a letter to her last Monday. Did you read a book yesterday? We didn't see him last Sunday. She sent a letter to her friend. Sam didn't buy a bike last week. He bought a car yesterday. She was in the village last Sunday. Were you a pupil in 2011? They were not at the Zoo last Saturday. Where were you yesterday? I wasn't at home last night. I was at aunt's home.
My mom influences me a lot. She always helps and supports me. I am choosing my future profession with her help. I always ask for mom's advice because she has big life experience and knows for sure how I should act. She gives me important advice about school. I didn't realize before the importance of everything she told me because I considered that I knew better myself. Her advice becomes more valuable for me as I probably get older. I try to take mom's example in many things. She is an example for me. Mom is very smart, responsible and always achieves the goals. I hope I can become a lot like her in future.
Since используется с указанием точного времени, момента во времени, с которого что-либо началось, как, например: March 31, или 9:19 a.m., или Tuesday.
Например:
I have been studying English since 1993.
Я изучаю английский с 1993 года.
For используется с указанием периода, промежутка времени, в течение которого что-либо совершается, происходит, как, например: 1 day, или 3 hours, или 5 years.
Например:
I have been studying English for 4 years.
Я изучаю английский 4 года.
С предлогом For можно использовать время Past Simple, если действие уже завершилось.