SN4 ""

No	Pattern	Freq
1	[verb] [pron] may have been	66
2	[verb] [pers pn] may have been	54
3	[vb base] [pron] may have been	31
4	[verb] it may have been	22
5	[verb] it may have been	22
6	think [pron] may have been	21
7	[vb past] [pron] may have been	14
8	believe [pron] may have been	13
9	[verb] they may have been	12
10	[verb] they may have been	11
11	think [pron] may have been	11
12	[verb] he may have been	10
13	[vb -s] [pron] may have been	9
14	[verb] there may have been	9
15	[verb] he may have been	9
16	[verb] there may have been	9
17	[verb] [ex0] may have been	9
18	believe [pron] may have been	8
19	[vb pp] [pron] may have been	7
20	suggest [pron] may have been	6
21	thought [pron] may have been	5
22	suggests [pron] may have been	5