SN4 ""

No	Pattern	Freq
1	[noun] [vb mod] have been	7410
2	[noun] [modal v] have been	7335
3	[noun sg] [modal v] have been	4393
4	[noun] would have been	2559
5	[noun] would have been	2559
6	[noun pl] [modal v] have been	1885
7	[noun] may have been	1278
8	[noun] may have been	1278
9	[noun prp] [modal v] have been	1017
10	[noun] must have been	928
11	[noun] must have been	928
12	[noun] could have been	824
13	[noun] could have been	824
14	[noun] might have been	755
15	[noun] might have been	755
16	[noun] should have been	592
17	[noun] should have been	592
18	[noun] will have been	404
19	[noun] will have been	404
20	[n mass] [modal v] have been	96
21	thing [modal v] have been	71
22	things [modal v] have been	52
23	life [modal v] have been	48
24	result [modal v] have been	46
25	people [modal v] have been	45
26	people [modal v] have been	44
27	man [modal v] have been	40
28	[noun] [modal v] 've been	39
29	life [modal v] have been	37
30	[noun] ought have been	36