①、He doesn't go to school in the morning.
②、Does he go to school in the morning?
③、Where does he go in the morning?she dustedthecupboardjust now划线部分是dustedthecupboard否定句一般疑问句对划线部分提问sam has a new car否定句一般疑问句对划线部分提问划线部分是a new cartom has been to shanghai several times 否定句一般疑问句对划线部分提问划线部分是 several times 用how ofter提问they did their homework after dinner否定句一般疑问句对划线部分提问划线部分是 after dinner这位童鞋不要偷懒哦，明白其中的道理才是关键。仔细看这几道题的结构很相似，变成否定句的话，是在实义动词（be动词、系动词）后面加not；变成一般疑问句是把Do提前，（若为Does，则还要把实义动词变成原形），句子的语序不变；对划线部分提问时，则要根据句意，适当的选用where、what、when、how、how often等。不知道你能看明白否？如果你还是不确定，你可以自己做好那几道题的答案，发上来给我看！我只是想对一下答案罢了，看看看有没有错的，答案是Samdoesnt have a new car does sam have a new car ?what does sam have ? Tom hasn't been to Shanghai several times.Has Tom been to Shanghai several times?How often has Tom been to Shanghai?What did she do just now?They didn't do their homework after dinner智能打这么多字了第一个完全正确；第二个应该是题目的问题（has gone to该比较现实吧，而且我觉得念for several times 比较顺）；第三个疑问句是：Did they do their homewotk after dinner?提问句是：When did they do their homework?看一下我上一个的解析，不知道能否帮到你？你是英语老师吗