ask me for do my homework,这句肯定不对,让某人做某事是：ask sb to do sth.所以这句该是：ask me to do my homeworkhe asked me about my free time activitiesask for ..是要求,短语不符合句子的意思,ask about ...ask for 后面必须是名词吗，可以用动词吗？通常是名词和代词，如果是动词，那么就用to而不用for了。