Hehadthehabitofsmoking(apipe)whenyoung,buthedoesnotsmokenow.这个怎样划分句子成分?

Question

He had the habit of smoking (a pipe) when young, but he does not smoke now.这个怎样划分句子成分?

Answer 1

如此划分：
he had the habit of smoking (a pipe) /when young,/but he does not smoke now.
这句话是说“他年轻时有抽烟的习惯,而现在他不抽了.”
when young可能是你理解的一个难点,这可以理解成一个时间状语,完整的说法是“when he was young”,因为“he was”跟前面的“he had”中的主语都是he,所以在后面就直接省掉了主语,这样就成when young啦.
整体来说,逗号前是一个完整的句子,逗号后又是一个,中间用but这个表示转折的词语来连接.