改错He hasn't often have lunch at home.我认为是将 hasn't 改为does't .可答案却是将often改为yet . 如果用完成时,那么后面那个have应该是had 才对呀.因为要用过去分词嘛.请赐教.
楼主说的没错,如果要用完成时的确要将have改为had,我同意楼主的观点,答案可能有误,楼主要相信自己.