A good boy always dresses himself properly and neatly.

一个好男孩总是穿着得体整洁。

youdao

I'm going to be a good boy now.

我现在要做一个听话的男孩。

《柯林斯英汉双解大词典》

Finish your lunch, there's a good boy.

把午饭吃完，乖孩子。

《牛津词典》

As a boy,Ben was not a good student.

VOA: special.2009.09.04

A good example is our shuttle service. It is provided by the Boy Scouts.

VOA: standard.2010.06.07

Looks like the Newton boy'sgot a big smile for you. Yeah, he's a good buddy.

VOA: standard.other

"I have to say, as every Derry mammy would say, he was a good boy, " Mr Martin said.

BBC: Northern Ireland

Gregory is a good boy, though all the Latin he has learned, all the sonorous periods of the great authors, have rolled through his head and out again, like stones.

NEWYORKER: Invitation to a Beheading

We are doing so fine, be a good boy.

CNN: Jack Ma Talkasia Transcript