lonely、alone有什么区别?就是只用法和词性以及意思上来说最好有例句

alone 副词 adv.单独；独自 by yourself;with no other people · She went home alone.她独自回家去了.· It's foolish of him to go alone.他单独去未免太傻了.· When his wife died,he lived alone.他的妻子死后...