a drought主語that a government official called the most severe Mexico have ever faced同位語從句has left主句謂語two million people主句賓語without access to water and,coupled with a cold snap,主句賓語補...不理解這句的成分that a government official called the most severe Mexico have ever faced 怎么有兩個謂語動詞抱歉，剛剛打錯了。這句話是定語從句。先行詞是the droughtthat是關(guān)系詞，充當(dāng)從句中called的賓語 a government official 定從主語called定從謂語the most severe 修飾定從賓語，即that代指的droughtMexico have ever faced 定從中的定從，先行詞仍是drought.關(guān)系詞省略了。