catch somebody's eye中,eye要不要加s 课文中没有加,但课后短语加了,怎办?

个人意见,两者均可.所以,课本上也是不至可否的.
catch somebody's eye在中学课本中可能说是习惯用语.
但catch somebody's eyes也经常有人说.
下面是网络上的一些例句,对照一下.
She uses many methods to catch his eyes or get him to notice her.
She uses many methods to catch his eye,or get him to notice her.
这两句是一样的意思吧.
Putting effort into your looks once in a while can catch his eyes.
Do you catch his eye every time you glance at him?
下面是Harry Potter中的一个句子.
She looked over at Draco and tried to catch his eyes but he ignored her,his eyes on Laylana.

catch somebody's eye，不加s。

somebody为不定代词，指可数名词时，接单复数均可不过单数更常用些 (我记得以前英语老师讲过

idiom,catch somebody's eye,to attract somebody's attention

catch somebody‘s eye
亲，悠着点给悬赏分啊，100分问这个不划算啊