当疑问句的动词（谓语）是不及物动词时需要加介词,及物动词时不需要加介词.中学常见的不及物动词主要有：live,agree,go,work,listen,look,come,die,belong,fall,exist,rise,arrive,sit,sail,hurry,fail,succeed.take...不是有【where are you going?】吗貌似也有【where did you arrived】啊、、、、where = 介词（prep）+which placewhere are you going？=Which place are you going to？where did you arrive？=Which place did you arrive at（in）？希望我的回答对您有帮助，谢谢！