SN4 ""

No	Pattern	Freq
1	[pron] might have [been] [prep]	79
2	[pers pn] might have [been] [prep]	60
3	[noun] might have [been] [prep]	39
4	[noun sg] might have [been] [prep]	20
5	it might have [been] [prep]	15
6	it might have [been] [prep]	15
7	he might have [been] [prep]	12
8	he might have [been] [prep]	12
9	[noun pl] might have [been] [prep]	11
10	they might have [been] [prep]	11
11	they might have [been] [prep]	10
12	[ex0] might have [been] [prep]	8
13	[noun prp] might have [been] [prep]	8
14	there might have [been] [prep]	8
15	there might have [been] [prep]	8
16	she might have [been] [prep]	8
17	she might have [been] [prep]	8
18	what might have [been] [prep]	7
19	what might have [been] [prep]	7
20	[Wh det] might have [been] [prep]	7
21	i might have [been] [prep]	6
22	i might have [been] [prep]	6
23	might [adv] have [been] [prep]	15
24	might [adv] have [been] [prep]	12
25	might well have [been] [prep]	5
26	might well have [been] [prep]	5
27	might have [been] [verb] [prep]	346
28	might have [been] [vb pp] [prep]	313
29	might have [been] [adj] [prep]	108
30	might have [been] [adj] [prep]	88