查人人中国名人网外籍助理:keep on doing sth.中的"on"是adv.还是prep.为什么？
来源：百度文库 编辑：查人人中国名人网 时间：2024/05/01 13:13:04
keep 作vt.也有“保持”的意思
keep doing sth.一直做某事
keep on doing sth. 坚持不懈做某事（表示不怕困难）
He kept sitting all day.
Thought it was raining outside,they kept on working in the field.
keep doing sth.一直做某事
keep on doing sth. 坚持不懈做某事（表示不怕困难）
He kept sitting all day.
Thought it was raining outside,they kept on working in the field.
on是prep
keep on 固定搭配：keep on 继续的意思
prep+n./ving
^_^
prep
keep on 是固定词组,"继续,保持"的意思
prep
固定用法.记住就行.其实老外没这么讲究的,这种语法都是用来折腾我们外国人的.
当然是prep啦。
其实看后面的DOING就知道是介词了