changeful

adj.易变的；不安定的；富于变化的

Is he always so changeful and abrupt? 他是不是经常都这样反复无常。

I know that Chang has beaten him several times. 我知道张打他好几回了。

Mr. Chang schooled me in the part I was to play . 张先生指导我如何表演我将担任的角色。

Little Chang Bao disguised herself as a boy. 小常宝把自己假扮成男孩。

Woman's a various and a changeful thing. 女人是反复无常,变化多端的。