第1个回答 2019-11-06
一、
一般现在时:
1.概念:经常、反复发生的动作或行为及现在的某种状况。
2.时间状语:
always,
usually,
often,
sometimes,
every
week
(day,
year,
month…),
once
a
week,
on
Sundays,
3.基本结构:动词
原形
(如主语为第三人称单数,动词上要加(e)S)
4.否定形式:am/is/are+not;此时态的谓语动词若为行为动词,则在其前加don't,如主语为第三人称单数,则用doesn't,通史还原行为动词。
5.一般疑问句:把be动词放于句首;用助动词do提问,如主语为第三人称单数,则用does,同时,还原行为动词。
6.例句:.
It
seldom
snows
here.
He
is
always
ready
to
help
others.
Action
speaks
louder
than
words.
二、
一般过去时:
1.概念:过去某个时间里发生的动作或状态;过去习惯性、经常性的动作、行为。
2.时间状语: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.基本结构:be动词;行为动词
4.否定形式:was/were+not;在行为动词前加didn't,同时还原行为动词。
5.一般疑问句:was或were放于句首;用助动词do的过去式did
提问,同时还原行为动词。
6.例句:She
often
came
to
help
us
in
those
days.
I
didn't
know
you
were
so
busy.
三、
现在进行时:
1.概念:表示现阶段或说话时正在进行的动作及行为。
2.时间状语:now,
at
this
time,
these
days,
etc.
3.基本结构:am/is/are+doing
4.否定形式:am/is/are+not+doing.
5.一般疑问句:把be动词放于句首。
6.例句:
How
are
you
feeling
today?
He
is
doing
well
in
his
lessons.
四、
过去进行时:
1.概念:表示过去某段时间或某一时刻正在发生或进行的行为或动作。
2.时间状语:at
this
time
yesterday,
at
that
time或以when引导的谓语动词是一般过去时的时间状语等。
3.基本结构:was/were+doing
4.否定形式:was/were
+
not
+
doing.
5.一般疑问句:把was或were放于句首。
6.例句:At
that
time
she
was
working
in
a
PLA
unit.
When
he
came
in,
I
was
reading
a
newspaper.
五
、过去完成时:
1.概念:以过去某个时间为标准,在此以前发生的动作或行为,或在过去某动作之前完成的行为,即“过去的过去”。
2.时间状语:before,
by
the
end
of
last
year(term,
month…),etc.
3.基本结构:had
+
done.
4.否定形式:had
+
not
+
done.
5.一般疑问句:had放于句首。
6.例句:As
soon
as
we
got
to
the
station,
the
train
had
left.
By
the
end
of
last
month.
We
had
reviewed
fo