时态 动词形式（以work举例） 标志词

一般现在时 work,works(三人称单数加s,es) often everyday,always...

一般将来时 will work tomorrow, next week/year...

现在进行时 is/are working now, at thistime,listen,look...

过去将来时 would work

现在完成时 has/have worked since, for+时间

过去完成时 had worked