SN4 ""

No	Pattern	Freq
1	[pers pn] may have been [adj]	112
2	[pers pn] may have been [adj]	83
3	it may have been [adj]	48
4	they may have been [adj]	21
5	he may have been [adj]	18
6	[pers pn] may have been [det]	14
7	[pers pn] may have been [num]	9
8	[pers pn] may have been able	8
9	[pers pn] may have been able	8
10	i may have been [adj]	6
11	[pers pn] may have been this	6
12	[pers pn] may have been involved	6
13	we may have been [adj]	6
14	she may have been [adj]	6
15	[pers pn] may have been [adj -er]	6
16	[pers pn] may have been involved	6
17	[pers pn] may have been this	6
18	you may have been [adj]	5