SN4 ""

No	Pattern	Freq
1	[pron] might have [been] [det]	26
2	there might have [been] [det]	14
3	[ex0] might have [been] [det]	14
4	there might have [been] [det]	14
5	[pers pn] might have [been] [det]	11
6	it might have [been] [det]	8
7	it might have [been] [det]	8
8	[noun] might have [been] [det]	6
9	[noun sg] might have [been] [det]	5
10	might [adv] have [been] [det]	6
11	might have [been] [prep] [det]	10
12	might have [been] [prep] [det]	10
13	might have [been] [verb] [det]	9
14	might have [been] [vb pp] [det]	6
15	might have [been] [art] [det]	5
16	might have [been] [art] [det]	5
17	might have [been] [adv] [det]	5
18	might have [been] in [det]	5
19	might have [been] [adv] [det]	5
20	might have [been] in [det]	5
21	might have [been] [det] [noun]	20
22	might have [been] [det] [noun sg]	20
23	might have [been] [det] [adj]	9
24	might have [been] [det] [adj]	6