不可数名词系动词就别are了
there is some milk in the glass
either or就近原则
either you or your mom has…
either your mom or you have…
用and连接的主语看成复数
有一些名词比如team，他们即可指整个team，也可表示team中每一个成员，这叫collective nouns
the other team does not arrive,so our team wins by default
our team were wearing blue shorts
可数名词单数形式第一次用到就加a/an，第二次the
具体的国家州县省湖泊山川不用冠词，the United Kingdom等国家由一系列州组成的除外，
像China，Guangdong，Lake michigan这些不用
lead in
question
quotation
statistic
relevant example
引用事例，导出观点
definition
conclusion
summary
重申论点
evaluation of the importance of the subject what we argue about
永远值得讨论的主题
action
warning
quotation
prediction
