It couldn’t be better 为什么用过去式

关于英语双重否定句I couldn't agree more .我知道是意为我非常同意,是表肯定的.可是从字面上看就好像是表否定的.这个例子并不鲜明,好理解,但这些就不好了：It couldn't be any worse.it couldn;t be bette it couldn't be used then It couldn't be better,you're the best.翻译 It couldn’t be better 为什么用过去式 It couldn't be worse 的汉语意思 it couldn't be any worse any为什么不是so couldn't be used then.It wasn't ( ) to use it.It couldn't be used then.It wasn't ( ) to use it.a)ableb)allowedc)impossibled)possible it couldn,t be better,but iknow,it wouldn,t be any Wait,tomorrow will be bette Wait,tomorrow will be bette You couldn't be more You will be bette 是什么意思 I think it may be I couldn’t immediately associate my knowledge with practice. It couldn't be any worse It couldn't be any better 如果把any去掉,句意是否会变It couldn't be any worse It couldn't be any better如果把any去掉,句意是否会变 求教!It couldn't be used then.It wasn't____to used itIt couldn't be used then.It wasn't____to used it为什么用possible,allowed为什么不行呢? couldn't be prouder怎么翻译 lt couldn't be any worse I couldn't be more sure. You couldn't be more relaxed是什么意思?