独立主格结构做时间状语：The spring festival 【coming】,people are all busy with all the things that they need,比较：时间状语从句：When the spring festival 【comes】,people are all busy with all the th...The spring festival 【coming】,people are all busy with all the things that they need,这个不是be doing的形式吧？doing

分词的一般式