It takes sb some time to do sth.为什么take 要+s.a lot 与a lot of
It takes sb some time to do sth.为什么take 要+s.a
it是第三人称单数，所以take要使用对应的单三形式 takes
a lot 和a lot of 区别
a lot：可以做【名词，或副词】.例如：
I have had a lot(=a lot of food)
You did it a lot better.
a lot of ：许多，大量.【既修饰可数名词，也可以修饰不可数名词】.后接名词、代词或名词词性法语名词性词组.
A lot of people haved done it successfully.
A lot of water has been used up.
