SN4 ""

No	Pattern	Freq
1	should [adv] have [be]	326
2	should [adv] have be	326
3	should [adv] have been	325
4	should [adv] have [been]	325
5	should [adv] have [be]	322
6	should [not/n't] have [be]	187
7	should not have [be]	186
8	should [adv] have [be]	139
9	should not have [be]	107
10	should n't have [be]	79
11	should never have [be]	69
12	should never have [be]	69
13	should also have [be]	8
14	should also have [be]	8
15	should perhaps have [be]	7
16	should perhaps have [be]	7
17	should certainly have [be]	6
18	should still have [be]	6
19	should certainly have [be]	6
20	should still have [be]	6
21	should surely have [be]	5
22	should surely have [be]	5