a drought主语that a government official called the most severe Mexico have ever faced同位语从句has left主句谓语two million people主句宾语without access to water and,coupled with a cold snap,主句宾语补...不理解这句的成分that a government official called the most severe Mexico have ever faced 怎么有两个谓语动词抱歉，刚刚打错了。这句话是定语从句。先行词是the droughtthat是关系词，充当从句中called的宾语 a government official 定从主语called定从谓语the most severe 修饰定从宾语，即that代指的droughtMexico have ever faced 定从中的定从，先行词仍是drought.关系词省略了。