许多人习惯上喜欢把介词加到及物动词后面,然后才带出宾语.最常见的是"emphasize/stress on/upon"和"discuss about",如：
⑧ Singaporeans seem to have emphasized on material gains.
⑨ In our education system,we stress upon examination results.
⑩ World leaders spent a lot of time discussing about worsening economic problems.
显然的,这三句里的介词"on/upon"和"about"是多余的,不必要的.你看问题没啊第三人称单数：stresses可数的做名词呢n.强调; 重音; 压力; 重力; vt.重读; [机械学]使承受压力; 给…加压力（或应力）;stress是可数名词还是不可数名词名词！我不说了吗可数名词可数名词和第三人称单数不一样！是吗，可能我有点望了