without the invention of the computer,there would have been no advance in today'sscience and technology为什么要用would have been 这个时态这不是和现在相反吗不应该是would be

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/08 19:07:58
without the invention of the computer,there would have been no advance in today'sscience and technology为什么要用would have been 这个时态这不是和现在相反吗不应该是would be

without the invention of the computer,there would have been no advance in today'sscience and technology为什么要用would have been 这个时态这不是和现在相反吗不应该是would be
without the invention of the computer,there would have been no advance in today'sscience and technology
为什么要用would have been 这个时态
这不是和现在相反吗
不应该是would be

without the invention of the computer,there would have been no advance in today'sscience and technology为什么要用would have been 这个时态这不是和现在相反吗不应该是would be
因为这是虚拟语气
和现在相反,但要表示的意思是已经完成的,所以要完成时

表示虚拟语气
如果没有电子计算机的发明,也就没有我们今天的科学和技术。