I myself more－it was a perfect day.
A. shouldn’t have enjoyed
B. needn’t have enjoyed
C. wouldn’t have enjoyed
D. couldn’t have enjoyed
网友回答
A. shouldn’t have enjoyed
B. needn’t have enjoyed
C. wouldn’t have enjoyed
(答案→)D. couldn’t have enjoyed
解析：句意：我实在是太开心了，真是很完美的一天。比较级与否定词连用表最高级，那么此处主要是看情态动词的选用了。A 本来不应该开心却很开心 B mustn’t后不会出现have done，搭配本身错误 C不会让自己更开心了 D不可能让自己更开心了（这是最开心的）比较级与否定词连用表最高级，还有类似的表达：I couldn’t agree with you more；it couldn’t be better…
【考点定位】情态动词