概念：過去某個時間裏發生的動作或狀態；過去習慣性、經常性的動作、行為。
2.時間狀語：ago,
yesterday,
the
day
before
yesterday,
last
week(year,
night,
month…),
in
1989,
just
now,
at
the
age
of
5,
one
day,
long
long
ago,
once
upon
a
time,
etc.
3.基本結構：be動詞；行為動詞
4.否定形式：was/were+not;在行為動詞前加didn't，同時還原行為動詞。
5.壹般疑問句：was或were放於句首；用助動詞do的過去式did
提問，同時還原行為動詞。
6.例句：she
often
came
to
help
us
in
those
days.
i
didn't
know
you
were
so
busy.
過去完成時：
1.概念：以過去某個時間為標準，在此以前發生的動作或行為，或在過去某動作之前完成的行為，即“過去的過去”。
2.時間狀語：before,
by
the
end
of
last
year(term,
month…),etc.
3.基本結構：had
+
done.
4.否定形式：had
+
not
+
done.
5.壹般疑問句：had放於句首。
6.例句：as
soon
as
we
got
to
the
station,
the
train
had
left.
by
the
end
of
last
month.
we
had
reviewed
four
books