is
1.Tracy is
a poor English teacher.
2.Tracy was
a poor teacher two years ago.
3.Tracy will
be a poor teacher next year.
4.Tracy has
been a poor teacher for a long time.
5.Tracy had
been a poor teacher for a long time when she
was fired by the school.
6.Tracy will
have been a poor teacher for a long time by
the time she retired form her job two years later. |
|