be questionable
His motives are questionable.
他的动机值得怀疑。
可疑的；有问题的；不确定的
道德上有问题的；不光彩的；成问题的；可疑的。；可质疑的；品行或道德上可疑的。；可以反驳的
open to doubt or challenge; uncertain or possibly not true
成问题的；可疑的。
Problematic; open to doubt or challenge.
可质疑的
subject to question
品行或道德上可疑的。
Of dubious respectability or morality.
可以反驳的
able to be refuted
The company's accounting practices are questionable, raising concerns among investors.
该公司的会计做法可疑，引起了投资者的担忧。
用法提示：“questionable”作形容词，表语，表示“可疑的”。
AI contextual example
It is questionable whether the new policy will actually improve the situation.
新政策是否真能改善情况，这很可疑。
用法提示：“questionable”用于“It is questionable whether...”结构，表示“很可疑”。
AI contextual example
His motives for offering help seemed questionable to me.
他提供帮助的动机在我看来很可疑。
用法提示：“questionable”作形容词，表语，表示“可疑的”。
AI contextual example
His motives are questionable.
他的动机值得怀疑。
The company engaged in questionable business practices.
该公司从事了有问题的商业行为。
I find it questionable that no one noticed the error.
我觉得没有人注意到这个错误是值得怀疑的。
语气比 questionable 稍强，常暗示怀疑其真实性或道德性
更强调不确定性，而不一定涉及道德问题
通常暗示有欺骗或非法行为的怀疑
侧重于可被质疑或争论，不直接指负面含义
grammar · medium
易错句子I am questionable about his decision.
正确表达I am doubtful about his decision.
questionable 是形容词，描述事物本身可疑，不能用来描述人感到怀疑；表达人的怀疑应用 doubtful 或 questioning。
grammar · medium
易错句子His honesty is questionable.
正确表达His honesty is unquestionable.
questionable 意为“可疑的”，而这里要表达“毫无疑问的”，应用 unquestionable。
对'questionable'（可疑的、有问题的）的反义
对'questionable'（可疑的、有问题的）的反义
对'questionable'（可疑的、有问题的）的反义
对'questionable'（可疑的、有问题的）的反义
对'questionable'（可疑的、有问题的）的反义
dubious 更强调主观上的怀疑或不信任，而 questionable 侧重客观上存在疑问或问题。
suspicious 常指引起怀疑的或对某事物持怀疑态度，而 questionable 更强调值得怀疑或有问题。
可疑行为
His questionable behavior at the party made everyone uncomfortable.
他在聚会上的可疑行为让所有人感到不舒服。
品味低劣
The decor showed questionable taste with clashing colors.
装饰品颜色冲突，显得品味低劣。
有问题的道德标准
The politician's questionable ethics were exposed by the media.
这位政客有问题的道德标准被媒体曝光了。
判断力差
Investing in that company showed questionable judgment.
投资那家公司显示了判断力差。
动机可疑
She had questionable motives for offering to help.
她主动提供帮助的动机可疑。
有效性存疑
The study's findings are of questionable validity due to small sample size.
由于样本量小，该研究结果的有效性存疑。
question (root)
question + -er
question + -ing
un- + question + -able
un- + question + -ably
question + mark
question + -able
question
常与 questionable 搭配，表示伦理上有疑问。
指某事物的有效性受到质疑，如 questionable validity。
描述信息来源或说法可信度低，如 questionable credibility。
动机可疑时，常用 questionable 修饰。
缺乏合理依据时，可称之为 questionable justification。
Dictionary facts from ECDICT, WIKTIONARY.