Since 1997 MMORPG (Massively Multiplayer Online Role-Playing Game) (1) be created , until now almost twenty- three years, but many psychiatrists and psychologists figure out that most of MMORPG players are a ddicted to the game, and they are (2)

Hi, Are the following expressions gramatically incorrect? No. I have been walking my dog these three years. He has been playing at the Wimbledon since he was 18 years old. A private English school's website in Japan

I have walked my dog these three years. -- OK He has played at Wimbledon since he was 18 years old. -- OK The site explains that the present perfect progressive form cannot be used to describe people's habitual activities unless the

. I have been walking my dog these three years. -- OK He has been playing at Wimbledon since he was 18 years old. -- OK A private English school's website in Japan says the above expressions should be changed to: I have

Are the following expressions gramatically incorrect? I have been walking my dog these three years. He has been playing at the Wimbledon since he was 18 years old. A private English school's website in Japan says the above

First sample: 1. I am working on it. (present progressive tense) It implies that the activity which is the work is in progress. 2. I have been working on it. (present perfect progressive tense) It implies that the work began in the past, has