情态动词的特殊用法,有多少?

常见的情态动词表达法与考点：（注意人称,肯定句与否定句的各自习惯用法）
1 表能力 can, could, be able to ,
2 表请求 can, could, shall, may ,will, would, must
3 表允诺，许可 can , may , shall,
4 表可能性 should, ought to
5 表必需，不得不, 不必要must, mustn’t, don’t have to , have to, needn’t
6 表建议 should, shouldn’t , ought to, ought not to, may, must
7 表习性 will, would, won’t wouldn’t
8 表肯定推测 must be , may be , must have done, could have done, may/might have done
9 表疑问性推测Can…be…? Can…have done…?
10 表该做而实际没做 should have done / ought to have done
11 表做了不该做的事， 做了不必做的事， shouldn’t have done, needn’t have done
12 表祝愿 May you+原形动词！ May you be lucky! May you succeed!