现在完成百时have/has + 过去分词。 用have还是has,要根据主度语的人称来确定。 第一人称(I)问 I have turned off the light. 第二人称(you单数) You have turned off the light. 第二人称(you复数) You have turned off the light. 第三人称(he/she/it) He/ She/ It has turned off the light. 总结:答第一人称,第二人称作主回语答时,用have。第三人称作主语时用has。 明白了吗。