举个例子:It is even possible that the older civilization may pass on the benefits of their experience in dealing with threats to survival such as nuclear war and global pollution, and other threats that we havent yet discovered.乍眼一看,有好多that,这时候就用到了语法分析,谓语是is,是that引导的是个主语从句,这样一分析是不是就简单多了,意思就是较老的文明也许能够将他们处理威胁的经验传播下去,而主语从句中又出现两个threats 的并列,这两个threats的定语也值得借鉴,第一个是用to do结构做定语,而第二个threats则是用that引导的定语从句,这点符合我们写作评分标准中的句型多样化,非常值得学习。