SN4 ""

No	Pattern	Freq
1	[vb mod] have been [noun] [prep]	152
2	[modal v] have been [noun] [prep]	152
3	[adv] have been [noun] [prep]	48
4	would have been [noun] [prep]	45
5	would have been [noun] [prep]	40
6	may have been [noun] [prep]	38
7	may have been [noun] [prep]	38
8	[adv] have been [noun] [prep]	33
9	must have been [noun] [prep]	29
10	must have been [noun] [prep]	29
11	[not/n't] have been [noun] [prep]	15
12	not have been [noun] [prep]	15
13	might have been [noun] [prep]	14
14	might have been [noun] [prep]	14
15	not have been [noun] [prep]	13
16	could have been [noun] [prep]	13
17	could have been [noun] [prep]	13
18	should have been [noun] [prep]	10
19	should have been [noun] [prep]	10
20	well have been [noun] [prep]	5
21	'd have been [noun] [prep]	5
22	well have been [noun] [prep]	5
23	have been [art] [noun] [prep]	770
24	have been [art] [noun] [prep]	770
25	have been a [noun] [prep]	401
26	have been a [noun] [prep]	354
27	have been the [noun] [prep]	313
28	have been the [noun] [prep]	313
29	have been [adj] [noun] [prep]	211
30	have been [prep] [noun] [prep]	111