過去式為fell,過去分詞為fallen現在分詞是falling,例如:
1、It is important not to let production levels fall.重要的是別讓產量滑落。
2、The results of the survey fell into two distinct groups.調查結果分為截然不同的兩組。
3、Students over 25 fall into a different category.25歲以上的學生屬另一類。
4、There is still a risk that the whole deal will fall through.整樁買賣化為泡影的風險仍然存在。