每日普通話 Daily Mandarin Chinese - “It has been 4 years since I smoked.” www.e-Putonghua.com

Learn Putonghua – “It has been 4 years since I smoked.” – www.e-Putonghua.com
我戒烟４年了。（Wǒ jiè yān ４ nián le）（不是“我抽烟4年了”）