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doubtful
英：【ˈdaʊtfl】美：【ˈdaʊtfəl】
英：
美：
adj.
可疑的, 怀疑的, 不确定的
副词:
doubtfully
名词:
doubt-fulness
1 、Of a
doubtful
or uncertain nature.───不确定的性质上有疑问或不确定的
2 、It is
doubtful
that they will finish on time.───他们是否将如期完成是值得怀疑的。
3 、The future looks very
doubtful
.───前途看来难以预测。
4 、I doubt the propriety of making a public statement before we have studied the official reports.───在我们对那些官方报告进行研究之前就发表公开声明，我怀疑这样做是否适当。
5 、No doubt her death is related to politics.───她的死无疑和政治有关。
6 、His father, too, seemed
doubtful
in his view.───他父亲的看法好象也模棱两可。
7 、There is (no) room for doubt.───(没)有怀疑的余地。
8 、It is
doubtful
whether she ll come .───她是否来还有疑问。
9 、I have no more reason to doubt him than he has to doubt me.─── 我没办法怀疑他 他没怀疑我就不错了
10 、There is no doubt about his innocence.───他完全是无辜的。
11 、The vacancy of the boys expression made his father doubt if he was listening.───儿子毫无表情使父亲怀疑他是否在专心听。
12 、Because of a long drought, the farmers are
doubtful
about the prospect of a good yield.───因为长时间的干旱，农民们对于好收成的前景是怀疑的。
13 、You need perseverance to win in politics and I doubt if he can go the distance.───在政治上，需要矢志不移才能取胜，我怀疑他能否坚持到底。
14 、The story he gave police is very
doubtful
.───他给警方的描述是很有问题。
15 、He was
doubtful
of the patients recovery.───他担心这病人不易痊愈
16 、He had a spasm of
doubtful
pride.───他体验了一阵不塌实的自豪感。
17 、The ethics of his decision are
doubtful
.───他的这一决定是否合乎道德规范值得怀疑。
18 、Have a lot of doubt, he can not help asking them question.───因为他有些疑问，他禁不住向他们提问。
19 、I do not doubt that it would be possible to inject ideas into the modern world that would utterly destroy us.───向现代世界灌输能彻底摧毁我们的意识形态是可能的，对此我并不怀疑。
20 、Theres no doubt no doubt at all, sir.─── 毫无疑问 毫无疑问 长官
21 、Jonathan always goes by the book: I doubt if he will let you do what you want.───乔纳森总是循规蹈矩：我怀疑他是否让你干你想干的事情。
22 、It is
doubtful
whether he can read my fortune or not.───他能否算出我的运气还是个疑问。
23 、He told me the whole story in spades and theres no doubt about it.───他明确地把整个经过都对我讲了，一点不含糊。
24 、And as long as you continue to doubt him, hell keep doubting himself.─── 只要你继续在质疑他 他就会继续自我疑惑下去
25 、He was
doubtful
about accepting extra work.───他拿不定主意是否接受额外工作。
26 、A
doubtful
claim;
doubtful
prospects.───令人怀疑的索赔案; 令人可疑的前景
27 、He is an author of
doubtful
reputation.───他是一位名声不太好的作家。
28 、He insinuated his doubt of her ability.───他暗示了他对她能力的怀疑。
29 、More reading may be allaying your doubt.───多读书或许可以减少你的疑惑。
30 、I have absolutely no doubt, and I have no doubt theres a medical cause for this.─── 我毫不质疑 而且毫无疑问 这一定有医学原因
31 、Shes
doubtful
whether we shall be able to come.───她怀疑我们是否能够前来。
32 、But it is
doubtful
if he had any principles at all.───但是此人究竟有无原则，实在令人怀疑。
33 、It is
doubtful
if we can get home before midnight.───在半夜之前我们能否到家，还很难说。
34 、No doubt he means to help, but in fact he just gets in the way.───他确实是想帮忙，然而事实上却只是帮倒忙。
35 、If all you have is doubt, then you make doubt itself the weapon.─── 如果你满腹疑云 就让怀疑成为你的武器
36 、He looked at me with a
doubtful
eye.───他用怀疑的眼光看着我。
37 、The weather looks rather
doubtful
,ie unsettled.───天气看来靠不住(可能会变天).
38 、The doubt that you did the right thing, the doubt that you could have done more, the doubt over if your friends really had to die.─── 怀疑自己是否做了正确选择 怀疑自己是否尽到力了 怀疑自己的朋友是否真的必须得死
39 、The fact that he won the first place is
doubtful
.───他得了第一名是让人可疑的。
40 、It is
doubtful
that he will come.───他会不会来值得怀疑。
41 、She was beyond all doubt the finest ballerina of her day.───她无疑是她那个时代最优秀的芭蕾舞演员。
42 、It is
doubtful
whether she will be able to come.───她是否能来令人怀疑。
43 、The propriety of her deeds was
doubtful
.───她的行为是否得体却是很可怀疑的。
44 、No doubt hell be all right.───他一定会好的。
45 、Do you doubt my word (ie think I am not telling the truth) ?───你怀疑我的话吗?
46 、It is
doubtful
whether she will get this job.───她能不能得到这份工作还不一定。
47 、They are
doubtful
whether he can afford it.───他们怀疑他是否能负担得起。
48 、To be suspicious, apprehensive, or
doubtful
.───产生忧虑、担心或怀疑
49 、Who has not stood
doubtful
at the parting of the ways?───在需要作出抉择的时刻，谁不曾犹豫过?
50 、Their acceptance of the contract is still in doubt.───他们是否接受那合同还说不准。
51 、He was
doubtful
of the outcome.───他对于结果没有信心。
52 、Johnson wont like your taking his best workman away. Hell be cursing me up hill and down dale, Ive no doubt.───你把约翰逊最好的工人挖走，他会不高兴的。我想他准会骂死我的。
53 、The question of world hunger is a very hard nut to crack. I doubt if well find the answer to it in my lifetime.───世界性的饥饿问题是个极其难以解决的问题，我恐怕人们在我这一辈子都找不出解决的办法。
54 、Its
doubtful
whether he can pass the examination.───他能否通过这次考试是令人怀疑的。
55 、They doubt if a man can be changed into a demigod.───他们怀疑是否可将人变成次神。
56 、It is
doubtful
whether he will recover.───他能不能康复现在还难说。
57 、I didnt have any doubts until I realized she had doubts.─── 我没有任何迟疑 可我觉得她有迟疑
58 、She convinced me that Paul was, beyond doubt, innocent.───她使我深信，保罗确实是清白无辜的。
59 、His mind hovered for a moment round the
doubtful
date on the page.───他的思想在本子上的那个可疑日期上犹豫了一会儿。
60 、If you are ever in doubts as to whether or not you should kiss a pretty girl, always give her the benefit of the doubt.───如果你在犹疑是否应该亲吻一个漂亮的姑娘的话，就把她尽量朝好处想罢。
61 、Always proofread completed letters very carefully. Consult dictionary when necessary or in doubt.───完成的书信一定要很小心地校对，有必要或怀疑时查典。
62 、A person of
doubtful
reputation or respectability.───名声不好的人名声或地位令人怀疑的人
63 、Even if the pay raise and Towers and Wrights difficulties hadnt taken center stage, its
doubtful
Congress would have accomplished much.───即使加薪之事，以及托尔和赖特所遭遇的困难未成为主要问题，国会也未必能有所作为。
64 、Theres some doubt about his suitability for the job.───他是否适合该工作有些疑问。
65 、Without a doubt, she is the best nurse in the hospital.───她无疑是那家医院最优秀的护士。
66 、He trotted out a most plausible story, but most of us were inclined to doubt the truth of it.───他提出了一个听起来很有道理的说法，但我们大多数人对此都持怀疑态度。
67 、Everyone is
doubtful
of her a spy.───大家都怀疑她是个**。
68 、It is
doubtful
whether he will be able to come.───他能否来还很难说。
69 、Open to doubt or challenge; problematic.───可疑的易于受到怀疑或挑战的; 有疑问的
70 、He was troubled by religious doubt.───他因对宗教的疑惧而十分烦恼。
71 、Then again, I doubt whether he will come.───再说,我怀疑他是否会来。
72 、He is without doubt the cleverest student Ive ever taught.───他确实是我所教过的学生中最聪明的。
73 、He felt very
doubtful
of the outcome.───关于结果他感到非常疑惑。
74 、He had a spasm of
doubtful
pride .───他心里充满了骄傲;他骄傲自大。
75 、Only Peter seemed a little
doubtful
.───只有彼得似乎有点儿怀疑。
76 、She had no doubt as to the correctness of her own estimate.───她对自己所作估计的正确性确信无疑。
77 、The weather looks rather
doubtful
, ie unsettled.───天气看来靠不住（可能会变天）.
78 、But at best it was a
doubtful
business.───可事情总不免有点儿玄。
79 、Yr. 16 information cannot make sure but very
doubtful
.───你方16日来电消息不术可靠，且值得怀疑。
80 、There is no doubt but he won.───对於他获胜这一点没有疑问。
81 、Its
doubtful
whether she will succeed.───她会不会成功尚难预料。
82 、In his eye there was a
doubtful
light.───他的眼睛闪烁着一种怀疑的光芒。
83 、I dont doubt that. I dont doubt that you can beat him.─── 这我毫不怀疑 我知道你可以打败他
84 、Because while theres no doubt as to their quality, there is some doubt about who I could sell them to.─── 尽管他们无疑都是上等货 但问题是我该把他们卖给谁
85 、His offence is so serious that I doubt whether he can be pardoned for it.───他的过错十分严重。我怀疑他是否会得到原谅。
86 、Another doubt arose in his mind, however, as this one disappeared.───但是这个疑虑消失了，另一个怀疑又浮上他的脑际。
87 、No doubt youve received the outturn samples of the inferior quality goods.───你们一定收到了质量低劣产品的到货抽样。
88 、You have doubts about what youve done and doubts about who you are.─── 你质疑自己的所为 质疑自己的本质
89 、She is right, beyond all doubt.───她无疑是对的。
90 、Whether he will come is
doubtful
.───他是否能来值得怀疑。
in question和in doubt的区别？
suspect----adj.nottobereliedonowtrusted;possiblyfalse
doubt-----n.(feelingof)uncertaintyordisbelief
两者都有怀疑的意思，最大的区别我想应该是两者的词性不同：suspect可以是动词、名词和形容词，而doubt不可以作形容词，若做形容词只能用doubtful.
建议参考《牛津高阶英汉双解词典》。
另外，关于词语区别方面的问题最好多查查字典。
doubtful的反义词？
肯定的反义词是不确定的。当我们说某件事情是不确定的时，我们表示对这件事情的真实性或确实性存在疑问。
而当我们说某件事情是肯定的时，我们确认这件事情是正确的或确实的，没有疑问。在生活中，我们常常面临着各种不确定的情况，需要通过各种方式来确认或证实事情的真实性。
因此，与不确定相对的肯定，代表着对事情的确认和确定，能够给人们带来内心的安全感和信任感。