The courteous boy was civil to everybody.

这个恭的男孩对每一个很有礼貌。

Being youngsters, we sat modestly at the back, never daring to speak.

我们些年轻,恭地坐在后面,始终不敢发言。

I do apologize most humbly.

我的确非常恭地道歉。

He’s a real Jekyll and Hyde. At home he shouts at his wife and children all the time; at work he’s always charming and friendly.

他才个有双重性格的呢！在家里冲着妻子儿女大喊大叫；上班时温良恭，和善友好。