it is easy said than done.为什么用done

it is easy said than done.为什么用done that's a easy said than done easier said than done中的said和done为什么要用过去分词 It's easy to said than done中间的to到底要不要? that’s easy said than done的例句 Easier said than done 英语报上有一句话：well done is better than well said.这里的well后面为什么要用过去 翻译:Easier said than done 翻译easier said than done It's easier said than done.这句话对吗? Well done is better than well said中文是? 翻译While achieving success is easier said than done ,persever