their suggestion has made the design better than it (would otherwise have been)would otherwise have been为什么不能用would be otherwise

问题描述:

their suggestion has made the design better than it (would otherwise have been)
would otherwise have been为什么不能用would be otherwise

他们的建议使得现在的设计比它原来的要好~
设计已经完成,当然要用现在完成时态~have been~