SN4 ""

No	Pattern	Freq
1	[noun] [pron] may have been [prep]	16
2	[conj] [pron] may have been [prep]	13
3	[noun sg] [pron] may have been [prep]	9
4	[coord] [pron] may have been [prep]	9
5	[noun pl] [pron] may have been [prep]	6
6	[pron] [noun] may have been [prep]	6
7	[pron] may [adv] have been [prep]	14
8	[pron] may [adv] have been [prep]	9
9	[pron] may well have been [prep]	6
10	[pron] may well have been [prep]	6
11	[pron] may not have been [prep]	5
12	[pron] may [not/n't] have been [prep]	5
13	[pron] may not have been [prep]	5
14	[pron] may have been [verb] [prep]	164
15	[pron] may have been [vb pp] [prep]	149
16	[pron] may have been [adj] [prep]	46
17	[pron] may have been [adj] [prep]	39
18	[pron] may have been [noun] [prep]	23
19	[pron] may have been [v-ing] [prep]	14
20	[pron] may have been [noun pl] [prep]	12
21	[pron] may have been [noun sg] [prep]	11
22	[pron] may have been used [prep]	10
23	[pron] may have been use [prep]	10
24	[pron] may have been [adv] [prep]	7
25	[pron] may have been written [prep]	6
26	[pron] may have been [adv] [prep]	6
27	[pron] may have been involved [prep]	6
28	[pron] may have been write [prep]	6
29	[pron] may have been involved [prep]	6
30	[pron] may have been [num] [prep]	5