奇怪的是，他的脸已经变得毫无表情。用英语怎么说？

奇怪的是，他的脸已经变得毫无表情。

His face had become peculiarly expressionless.

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

face

n. 面容，表面，脸，方面；vt.& vi. 面对，面向…，正视，承认；vt. （感到不能）对付，（明知不好办而）交谈，必须对付（某情况），面临…；

例句
Graham hit him across the face with the gun.
格雷厄姆用枪击打他的脸部。

had

v. 有（ have的过去式和过去分词 ），（亲属关系中）接受，拿，买到；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

become

vi. 变为，成为，变得，变成；vt. 适合，适宜，相称，相当，变成，发生；

例句
...abandoned buildings that become a breeding ground for crime.
沦为了犯罪温床的弃置楼群

peculiarly

adv. 异常地，尤其地，古怪地，单独地；

例句
His movements were clumsy, and his gait peculiarly awkward.
他动作笨拙，步态尤其难看。

expressionless

adj. 无表情的；

例句
That expressionless face had seemed deep and mysterious.
那张毫无表情的脸看上去深沉而又神秘。