forgetful
adj. 健忘的，记性差的；疏忽的，不经心的
例句
I'm getting forgetful in my old age.
我上了年纪，变得健忘了。
《牛津词典》
She has become very forgetful in recent years.
近年来她变得十分健忘。
His father began to lose his memory bit by bit, becoming increasingly forgetful.
他父亲的记忆力开始一点点衰退，变得越来越健忘。
《柯林斯英汉双解大词典》
