一般不加介词 of , 例如：there are a few things you should write down before you forget.如果加 of 后面things 就得加冠词 the，few of the things 和 a few of the things 的形式都存在，等同 some of the things 的用法例如： (A) Few of the things people tend to do before they take a trip abroad are: ......
