什么叫时间副词

today,yesterday,tomorrow,the day before yesterday,the day after tomorrw,last year,now,then,one year ago, soon, still, already,ever now and then ,from now on ,from then on ,tonight,yet,tomorrow morning ,tomorrow afternoon,tomorrow evening ,tomorrow night . last week, last year,this week/weekend/month/year
1.时间副词表示时间或期间,如：today(今天),tomorrow(明天),yesterday(昨天),now(现在),soon(不久),then(那时),recently(近来),lately(近来),afterwards(后来)等.
2.时间副词用在句尾.
I went to the bar yesterday.
我昨天去酒吧了.
3.时间副词用在句首以加强语气.
Tomorrow I shall attend a meeting.
明天我将参加会议.
4.句中若出现多个时间副词,短时间在前,长时间在后.
It took place at 4 o'clock on the 4th of May, 1896.
它发生于一八九六年五月四日四点钟.
5.表示时间的副词或副词短语前不加介词或定冠词.
中文：他下星期一回来.
(误)He will be back on next Monday.
(误)He will be back the next Monday.
(正)He will be back next Monday.
6.still(还,仍然),yet(还,仍然)等是特殊的时间副词,一般用于强调某种时态.【参见时间介词】
I am still standing.
我还在站着.
Is everything ready yet?
一切都准备好了吗?