1.I
can't
agree
on
your
plan.
我不同意你说的
2.
现在完成时的语言标志
have
done
sth.这是核心.时间标志是for
sometime.其他标志yet,already.
例如:I
haven't
finished
my
homework
yet.
I
have
finished
my
homework
already.
I
have
been
here
for
many
years.
过去进行时的语言标志
一般过去时的语言标志
动词都是过去式了,时间状语也都是表示过去的,例如yesterday,in
the
past,three
years
ago等等.
一般现在时用动词原形或第三人称单数形式。标志词有：every
day,
evry
Sunday,
often,
always,
usually,
sometimes
,
on
Sundays,
on
weekdays等等。
现在进行时am/is
/are+v-ing形式。标志词：now,at
the
moment
Look!,
Listen!
一般过去时用动词的过去式。标志词有：yesterday,
last
week
,
last
month,
last
year,
two
years
ago.
一般将来时用will
+v(原形）.标志词：tomorrow,in
the
future,
next
week
,
next
Sunday.
过去进行时：was/were+doing
标志词：at
that
moment,
at
this
time
of
yesterday,
at
eight
last
night.
现在完成时：have/has+动词的过分词.标志词：ever,never,
since,already,yet,before.twice,
once
,three
times.
过去完成时：had+动词的
过去分词。此时态是发生在过去的过去，就是在过去之前发生的事。通常用在从句里。有时也有标志词：by
the
year
2000
while
一般表示主句和从句中两个动作同时发生，可译成“一边...，一边...”。过去进行和现在进行均可。e.g
I
am/was
making
notes
while
listening.
when
则用途更广，“同时；先；后均可”。e.g
when
he
came
in,
I
was
reading
a
newspaper.
as
含有“伴随着...”.
e.g
As
I
am/was
growing
up,
I
learn
a
lot
things.
过去时态中出现while,一般跟过去进行时。
注意：while还可用作转折连词“而”。所以见到它要看清楚。