Ken gave up smoking two years ago. He'd been smoking for thirty years.
两年前肯戒了烟，之前他抽了三十年烟。
英语语法突破 200 句
过去完成进行时
📚 句中词汇解析
从本句中提取的重要词汇
n. 三十;三十个;三十年代;三十的记号;
adj. 三十的，三十个的;
num. 三十;三十个;
💡 thir=three三+ty十 → 三十
"There are thirty people in the classroom, counting the teacher."
把老师算上,教室里有30个人.
smoking
['sməukiŋ]
n. 吸烟，抽烟;
v. 冒烟( smoke的现在分词);抽烟;用烟熏制;吸（烟）;
"Smoking is a causative factor in several major diseases."
抽烟是引起几种严重疾病的病因。
近义：nicotinism, aspersion, fumigation, smoggy, smoky, fuming
v. 给予，赠送( give的过去式 );（与名词连用描述某一动作，意义与该名词相应的动词相同）;供给;交给;
"The boss gave him the push due to his careless work."
由于他工作不细心,老板解雇了他.