You shouldn’t leave a child alone in the house.
你不应该把小孩独自留在家里。
My wife and I like to spend time alone together away from the kids.
我和妻子喜欢没有孩子打扰，过二人世界。
She has lived alone in this house for almost five years now.
她现在已经独自在这所房子里住了差不多五年了。
adj. 独自的；单独的；孤独的
independent、
isolated、
separate、
sole
adv. 独自地；单独地
respectively、
solely
n. aloneness