past (过去)、now (现在)、future(未来)、yesterday(昨天)、 today(今天)、tomorrow(明天)、second (秒)、minute (分)钟、hour(小时)等
These things happened in the past years.
这些事情都发生在过去的年代里。
Right, I've got it now.
嗯,我现在明白了。
Yesterday, her future seemed assured.
昨天,她的未来似乎还很有保证。