i want to know why he is so tall是对的.宾语从句没有倒装的,或疑问语气.如果是i want to know what is his name呢？ 这个是正确的吗？ 如果是，那为什么不跟上面句子一样用 what his name is 呢？ 如果不是，那不就是倒装了？看看一楼的解释。陈述语气，即：主语 +谓语+ 其他成分宾语从句的语序：连词（what/when/why/ where/how/who等） + 主语 + 谓语what is his name 主语what+系动词+表语 是陈述语气。what his name is连词what +主语+系动词是陈述语气。