He says he'll write a letter soon.这句话是不是同时是间接引语又是宾语从句呢?亲们给点意见吧!

是的, 这句话是间接引语, 其中的he'll write a letter soon.是宾语从句.
直接引语变成间接引语, 实际上,就是把直接引语变成了间接引语中的宾语从句.
如: She said , " I can speak English." (直接引语)
She said that she could speak English. (间接引语, that she could speak English.为宾从)

实际上，间接引语大都是宾语从句。
所以这句话可以看成是间接引语 也可以说是宾语从句，
一般来说，直接引语变间接引语是，时态要发生变化，但是此句的谓语动词是一般现在时，所以可以不用变化。不过加上always可能要好一点：
He always says：“ i will write a letter soon."
--- He always says he will write a letter soon.
还有不懂可以继续发问哦~~~

是

He says,“ I'll write a letter soon.”这是直接引语
He says (that) he'll write a letter soon. 这是间接引语也是宾语从句，从句he'll write a letter soo做say的宾语。