惯常的用法和样例：
例句
-
给人送生日礼物是惯常的事。
It's customary to give people gifts on their birthdays. -
她惯常把随手拈来的东西作为规定的饮食。
She used to diet on any kind of food she could lay her hands on. -
海盗过去惯常把人们遗弃在荒岛。
Pirates used to maroon people on desert islands. -
他惯常能够找到什么活就干什么活。
He used to do such work as he could pick up. -
惯常想知道自己的孩子在哪里的旧式母亲，如今有了个想知道自己的母亲在哪里的孙子。
The old-time mother who used to wonder where her boy was now has a grandson who wonders where his mother is.
