句型转换(每空一词).1.I have been to Macau before.(改为否定句) I ______ ________ been to Macau be

问题描述:

句型转换(每空一词).1.I have been to Macau before.(改为否定句) I ______ ________ been to Macau be

have never

have not

haven't 如果两个空就have never