in the future i think cities will be crowded because there will be a lot more people.

在这里a lot作副词短语,在句中作程度状语,表示“很；非常；常常”,修饰动词、感叹词、介词短语、形容词或副词的比较级.in the future i think cities will be crowded because there will be a lot more people.a lot 后面加名词不是必须要加of 吗,为什么这个没加？亲，在这里，a lot 作副词讲，是非常的意思，修饰形容词morea lot more 即非常多，整体看做形容词。如果你一定要加of那么就去掉more，a lot of 即非常，作形容词。形容词修饰名词。发错了不好意思。yao ming ,one of china`s best ever basketball players,is more than 2 meter tall这里 tall能改成height么不能人高矮用tall和short来形容。