电子表格公式完成时的四种时态的基本结构
起承转合的意思1. 现在完成时：have/has + 过去分词。
例如：I have finished my homework.
2. 过去完成时：had + 过去分词。
东山晴后雪
品牌地板排名例如：By the time I arrived home, my mother had already cooked dinner.
心火亢盛3. 将来完成时：will have + 过去分词。
例如：By this time next year, I will have graduated from university.涂自强的个人悲伤
4. 现在完成进行时：have/has been + 现在分词。
例如：I have been studying English for four years.