an engineer,这样表达对吗?

an engineer,这样表达对吗? 请问过去式这样表达对吗? an engineer 翻译 ?uncle is an engineer 这样的英语句子表达对吗? 这句话的语法这样表达对吗? does your uncle an engineer? ___________?He is an engineer. Mr.Smith is an engineer. An old friend of [ ] is an engineer. Is he an engineer or an architect? He is an English engineer.(a Gearman engineer)(选择疑问)