教你一个简单方法suggest that后面加的应该是一个陈述句,when做的不是suggest 的宾语而是作状语,状语可以放后面,你把when引导的状语从句放到后面就成了The article suggests that he should be especially careful to have a well-balance diet when a person ( ) under unusual stress.这下显而易见 suggest后面的从句用的就是should be结构,而后面when引导的状语从句应该和主句的时态一致,主语article后面的 suggests 用的是现在时,所以when引导的从句也应该用现在时.