doubtful

英 ['daʊtfl] 美 ['daʊtfl]

• adj. 可疑的；怀疑的；不确定的

双解释义

adj. (形容词)

1. 难以预测的,未定的

   uncertain; not settled

2. 怀疑的,可疑的

   not trusting; questionable

详尽释义

adj. 形容词

1. 怀疑的，可疑的， 令人生疑的，不太相信的
2. 含糊的，疑惑的，有疑问的
3. 难以预测的
4. 不明确的
5. 不好的，未必好的
6. 低劣的
7. 未必货真价实的
8. 靠不住的，拿不准的

英英释义

Adjective:

1. open to doubt or suspicion;

   "the candidate's doubtful past"
   "he has a dubious record indeed"
   "what one found uncertain the other found dubious or downright false"
   "it was more than dubitable whether the friend was as influential as she thought"
   

2. fraught with uncertainty or doubt;

   "they were doubtful that the cord would hold"
   "it was doubtful whether she would be admitted"
   "dubious about agreeing to go"
   

3. unsettled in mind or opinion;

   "drew a few tentative conclusions"
   

例句

用作形容词 (adj.)

1. It is doubtful whether it is true or not.
   这件事的真假是可疑的。
2. The fact that he won the first place is doubtful.
   他得了第一名是让人可疑的。
3. He is an author of doubtful reputation.
   他是一位名声不太好的作家。
4. 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。
5. I am doubtful about the propriety of granting such a request.
   我怀疑答应这项要求是否合适。
6. It is doubtful whether the old man will recover from the operation.
   那老人手术后是否会康复难以确定。

常见句型

用作形容词 (adj.)

用作定语

～+ n.

1. This is a doubtful battle.
   这是一场胜负难测的战争。
2. Let's try to clear up our difficult and doubtful points.
   让我们设法把难处和疑点解决一下。

用作表语

S+be+～

1. The weather looks very doubtful.
   这天气很靠不住。
2. Everyone was doubtful at first, but his statement in detail held up.
   起初大家都怀疑,但他的详细叙述证明情况属实。

S+be+～+ prep .-phrase

1. I feel very doubtful about this.
   我对这点很怀疑。
2. I feel doubtful about his ability to do the work.
   我怀疑他有无做这件事的能力。
3. He was doubtful of the patient's recovery.
   他怀疑病人是否痊愈。
4. I am very doubtful of that.
   我很疑心那件事。

S+be+～+wh-to- v

1. I'm doubtful where to go.
   该往哪里去我心中无底。

S+be+～+wh-clause

1. I feel doubtful what I ought to do.
   我不知该做什么。
2. She is doubtful whether her mother really likes the present.
   她怀疑她母亲是否真喜欢那个礼物。

It is/was+～+that/wh-/if-clause

1. It is doubtful if our resources will hand out for more than two or three days more.
   我们的资源能否再维持两三天以上,值得怀疑。
2. It is doubtful whether it is true or not.
   这事的真假是可疑的。
3. It is not doubtful that he will give up smoking.
   他会戒烟是不用怀疑的。

经典引文

• A doubtful Passage in a Latin Poet.

  出自： Addison

• The question whether certain doubtful forms should be ranked as species or varieties.

  出自： C. Darwin

• It was doubtful if he knew who Andrew Jackson was.

  出自： Scott Fitzgerald

• A change which is not an unquestionable improvement is a doubtful blessing.

  出自： E. F. Schumacher

词汇搭配

• existence doubtful 疑存
• doubtful hit 可疑刺或劈
• doubtful prognosis 预后可疑,预后难定...
• doubtful operation 原因不茂作,原因不明...
• doubtful circuit 可疑电路
• doubtful loan 可疑放款
• doubtful breach 可疑犯规动作...
• be doubtful about 对 ... 感到疑惑...
• doubtful species 可疑种
• doubtful debts provision 预提坏账准备...
• doubtful assets 可疑资产
• position doubtful 疑位
• doubtful debts 可疑债务
• doubtful accounts [经] 呆帐, 可疑...
• doubtful debt 呆帐
• play a doubtful card 采用不可靠的办法...

词语用法

adj. (形容词)

1. doubtful从主观角度说,指某人“怀疑”某人某事,后面常接介词of或about,意为对…怀疑; 从客观角度说,指某人某事“令人怀疑”,意为“可疑的,使人产生疑问的”。
2. doubtful作“怀疑的,不能肯定的”解时,可接由where, what, whether等引导的短语或从句。
3. 在“It is doubtful”之后常接whether或if引导的从句,用于疑问或否定结构时, doubtful可搭用it的同位结构的that从句。

词义辨析

questionable，doubtful，ambiguous，uncertain

• 这些形容词均含“怀疑的，不确定的”之意。
• questionable通常指怀疑某行为是否恰当，或指有根有据的怀疑。
• doubtful指对某个问题持积极怀疑的，有疑问的态度，强调缺乏确信。
• ambiguous指因缺乏明确感或因为有各种不同的解释而值得怀疑。
• uncertain多指因缺乏证据或了解而捉摸不定，也指因不能预料而不能作出选择。

近反义词

【近义词】

• dubious
• unclear

【反义词】

• trustful
• trusty