SN4 ""

No	Pattern	Freq
1	[conj] [det] may have been [adj]	7
2	[det] [noun] may have been [adj]	27
3	[det] [noun pl] may have been [adj]	14
4	[det] [noun sg] may have been [adj]	13
5	[det] may [adv] have been [adj]	10
6	[det] may [adv] have been [adj]	8
7	[det] may well have been [adj]	6
8	[det] may well have been [adj]	6
9	[det] may have been [art] [adj]	27
10	[det] may have been [art] [adj]	27
11	[det] may have been a [adj]	14
12	[det] may have been the [adj]	11
13	[det] may have been a [adj]	11
14	[det] may have been the [adj]	11
15	[det] may have been [adj] [prep]	19
16	[det] may have been [adj] [prep]	19
17	[det] may have been [adj] to	10
18	[det] may have been [adj] to	10
19	[det] may have been [adj] [noun]	6