Sweep the floor everyday is our duty. Sweep the floor everyday is our duty. 这句话好像有了"sweep"和"is"两个动词 如果把"everyday"去掉了, 变成 Sweeping floor is our duty. 3Q~
不对. 要么Sweeping the floor every day is our duty./ 要么It's our duty to sweep the floor every day . 另外,注意:every day 要分开写,是两个单词,写成一个词是形容词,作定语 如everyday English ,everyday work.