为什么是What is his job 为什么不用 him

为什么What is your parents' job?中的parent是复数却不用are而用is? 1what's his job为什么用his呢 是因为job是名词吗? 他的工作是?英语翻译what is his jib?为什么句中的is不用does? when is his birthday? 句子开头为什么不用what? 为什么what is you job是对的 the loss of his job为什么不用lost I don't know what is the matter with him这里为什么不用陈述句句式 what nationality is he这句的he为什么不用him What are your parents' job为什么不用What are your parent's job? I helped him find his father.为什么find不用过去式? what kind of job do you like?job用不用加S .为什么? It is his nervousness that probably cost him his job这个是主语从句吗