ought「ought to的否定」
ought的用法
ought to
是一个比较奇怪的情态动词,因为其他所有情态动词都后接动词原形,而ought to虽然也是后接动词原形,但却无意中构成了ought to do sth结构,其中的to do sth便是一个典型的带to不定式,并且ought to do sth在用法上也是基本上将ought与to do sth分开使用。
(1)表示出于职责、义务该做某事

You ought not to be so careless in your work.你不应该在工作上如此粗心大意。
We ought to study hard for the sake of our motherland.我们应该为了我们的祖国而努力学习。
(2)表示极有可能发生某事
As an auto repairman, Dick ought to know what is wrong with the car.作为一个汽车修理工,狄克应该知道这部车的毛病所在。
Tomorrow ought to be a nice day for we have such a fine sunset today.今天有这么好的晚霞,明天准是个晴天。
ought 和should的区别
答:1.should
表示“劝告”,“建议”或“义务”时,译作“应当”,
He
should
take
care
of
his
parents
as
they
are
old
enough
not
to
live
on
themselves.
由于父母亲老了,不能自理,他应当照顾他们。
ought
to,接动词原形表示“有义务”或“必要”做某事,译为“应当,应该”
2.should
have
done在虚拟语气中表示“责备或后悔””
ought
to
have
done
sth,
should
have
done
sth
本应该做某事,而事实上并没有做。否定句表示"不该做某事而做了"。
You
ought
to
(should)
have
been
more
careful
in
this
experiment.
He
ought
not
to
have
thrown
the
old
clothes
away.(事实上已扔了。)
3.在这两个方面,用法基本相同,ought
to
在语气上比should
要强。
4.Should还表示“预测”和“可能”
He
should
be
there
now.
他可能到了。
5.Should在虚拟语气的用法中,用于从句中。
1)
It
is
demanded
/
necessary
/
a
pity
+
that…结构中的主语从句的谓语动词要用should
加动词原形,
should
可省略。
句型:
(1)suggested
It
is
(2)important
that…+
(should)
do
(3)
a
pity
(1)suggested,
ordered,
proposed,
required,
demanded,
requested,
insisted;
+
(should)
do
(2)important,
necessary,
natural,
strange
a
pity,
a
shame,
no
wonder
(3)It
is
suggested
that
we
(should)
hold
a
meeting
next
week.
It
is
necessary
that
he
(should)
come
to
our
meeting
tomorrow.
2)在宾语从句中的应用
在表示命令、建议、要求等一类动词后面的从句中。
order,
suggest,
propose,
require,
demand,
request,
insist,
command,
insist
+
(should)
do
I
suggest
that
we
(should)
hold
a
meeting
next
week.
He
insisted
that
he
(should
)
be
sent
there.
ought与should的区别
1、句中语气不同
ought to表达的语气比should强烈,在表示推测时,意为“按常理说应该……”,暗示有很大的可能性,有时可译为“建议或劝告”。
2、主观语境不同
表示出于法令规则、行为准则、道德责任等客观情况而“应该”做某事,通常用ought to;若用should则含有个人意见,强调主观看法。
3、特殊用法不同
在公告、须知或条例中,出于礼貌,常用should。
扩展资料
ought to的一般疑问句形式是将ought提到句首。
例如:She ought to leave now.
她现在应该离开了。
Ought she to leave now?
她现在应该离开了吗?
解析:ought to的一般疑问句的变法和其他句型的一般疑问句变法类似,但是ought to的一般疑问句只提前ought,不提前to
ought to的反意疑问句常常可以和should的反意疑问句互换,要领悟反意疑问句的法则→反意疑问句口诀:前肯后否;前否后肯。该句中前一句为肯定句,所以在反问部分要用否定句。
ought的过去分词
ought是情态动词,没有过去式,也没有过去分词,都是原型形式.
一般来说,ought都是和to连用,表示应该的意思.
希望我的答案您能满意.
