SN4 ""

No	Pattern	Freq
1	[det] [vb mod] have been [adj]	227
2	[det] [modal v] have been [adj]	220
3	[det] [modal v] have been [adj]	173
4	[det] would have been [adj]	112
5	[det] would have been [adj]	112
6	that [modal v] have been [adj]	110
7	this [modal v] have been [adj]	86
8	[det] may have been [adj]	38
9	[det] may have been [adj]	38
10	[det] must have been [adj]	22
11	[det] must have been [adj]	22
12	[det] could have been [adj]	21
13	[det] could have been [adj]	21
14	[det] [modal v] have been [num]	20
15	[det] [modal v] have been [det]	20
16	[det] might have been [adj]	17
17	[det] might have been [adj]	17
18	[det] [modal v] have been due	14
19	[det] [modal v] have been [adj -er]	14
20	[det] [modal v] have been due	14
21	these [modal v] have been [adj]	12
22	[det] [modal v] have been one	12
23	[det] [modal v] have been one	12
24	[det] should have been [adj]	11
25	[det] should have been [adj]	11
26	[det] [modal v] have been true	10
27	[det] [modal v] have been true	10
28	[det] [modal v] have been enough	9
29	[det] [modal v] have been enough	9
30	[det] [modal v] have been good	8