SN4 ""

No	Pattern	Freq
1	[vb mod] have been [art] [noun]	1517
2	[modal v] have been [art] [noun]	1517
3	[modal v] have been [art] [noun sg]	1430
4	[modal v] have been a [noun]	926
5	[modal v] have been a [noun]	797
6	[modal v] have been the [noun]	471
7	[modal v] have been the [noun]	471
8	would have been [art] [noun]	453
9	would have been [art] [noun]	436
10	must have been [art] [noun]	274
11	must have been [art] [noun]	274
12	may have been [art] [noun]	239
13	may have been [art] [noun]	239
14	could have been [art] [noun]	213
15	could have been [art] [noun]	213
16	might have been [art] [noun]	201
17	might have been [art] [noun]	201
18	[modal v] have been an [noun]	129
19	[modal v] have been no [noun]	117
20	[modal v] have been no [noun]	117
21	should have been [art] [noun]	109
22	should have been [art] [noun]	109
23	[modal v] have been [art] lot	44
24	[modal v] have been [art] lot	44
25	[modal v] have been [art] [noun pl]	43
26	[modal v] have been [art] case	41
27	[modal v] have been [art] case	41
28	[modal v] have been [art] bit	37
29	[modal v] have been [art] bit	37
30	[modal v] have been [art] [noun prp]	32