doubtful的翻译解释和例句

意思：怀疑的，不确定的；可疑的；不可靠的

怎么读（音标）：[ˈdaʊtfəl]

用法：doubtful是一个形容词，用来描述某件事物或某个人引起怀疑或不确定性。它可以用来修饰名词，也可以作为谓语动词后面的补语。

例句1-5句且中英对照：

1. She gave a doubtful look when I told her the news. (当我告诉她这个消息时，她露出了怀疑的表情。)

2. It is doubtful whether he will come to the party tonight. (他今晚是否会来参加派对还是个未知数。)

3. The authenticity of the painting is highly doubtful. (这幅画的真实性非常值得怀疑。)

4. He had a doubtful reputation in the town, so no one trusted him easily. (他在镇上名声不好，所以没人轻易相信他。)

5. The weather forecast for tomorrow is doubtful, so we should bring an umbrella just in case. (明天的天气预报不太确定，所以我们应该带把伞以防万一。)

同义词及用法：suspicious、uncertain、questionable、ambiguous

1. suspicious：可疑的，引起怀疑的。与doubtful相比，suspicious更强调对某件事物的怀疑和不信任。：The police found some suspicious items in his car. (在他的车里了一些可疑的物品。)

2. uncertain：不确定的，未知的。与doubtful相比，uncertain更强调对某件事物的不确定性和无法预测性。：The future of the company is uncertain due to the economic downturn. (由于经济下滑，公司的未来是不确定的。)

3. questionable：可疑的，值得怀疑的。与doubtful相比，questionable更强调对某件事物有问题或存在疑点。：His actions during the meeting were highly questionable. (他在上的行为非常值得怀疑。)

4. ambiguous：模棱两可的，含糊不清的。与doubtful相比，ambiguous更强调某件事物有多种可能性或含义，令人难以理解或判断。：His speech was full of ambiguous statements, making it hard for us to understand his true intentions. (他的讲话充满了模棱两可的陈述，让我们很难理解他真正想要表达什么意思。)

编辑总结：doubtful是一个常用且多义性较强的词汇，在描述某件事物时可以表达出怀疑、不确定、可疑、不可靠等含义。在使用时，需要根据具体语境来确定最合适的同义词，以准确表达自己的意思。同时，为了避免歧义，建议在使用doubtful时搭配具体的描述词或者介词短语，如highly doubtful、doubtful about等。