各位老师好!我在网上看到这样一道正误判断题:How are you doing? 我认为这个句子是错误的,因为 do 是及物动词,应该带宾语,正确的句子应该是:What are you doing ? 但是,参考答案说“How are you doing? ”是正确的。请问为什么“How are you doing? ”是正确的?
How are you doing?=How are you ?