base on还是based on

问题描述:

base on还是based on
()on the city‘s population of 19 million,this means more than 7 million people in the city are “tossing and turning” every night in order to()
老师第一个空的答案是Based可为什么不是Base啊.第二个是get to sleep.请问get asleep不行么.

Based 是过去分词,在句子中做状语部分,而base 是动词,必须要有相对的名词主语引导,不然句子就缺少成分了.get to sleep 是去睡觉,get asleep 是睡着了,两者程度不同