SN4 ""

No	Pattern	Freq
1	who have been [verb] [prep]	1558
2	who have been [vb pp] [prep]	1226
3	who had been [verb] [prep]	935
4	who have been [v-ing] [prep]	332
5	who have been [verb] in	265
6	who have been [verb] [prep]	262
7	who have been [verb] by	257
8	who has been [verb] [prep]	223
9	who have been [verb] to	223
10	who have been [verb] for	180
11	who have been [verb] from	113
12	who have been [verb] with	101
13	who have been [verb] on	86
14	who 'd been [verb] [prep]	59
15	who have been [verb] of	58
16	who have been [verb] as	54
17	who have been [verb] at	49
18	who 's been [verb] [prep]	45
19	who have been [verb] into	41
20	who 've been [verb] [prep]	33
21	who have been appoint [prep]	32
22	who have been appointed [prep]	32
23	who have been arrest [prep]	30
24	who have been arrested [prep]	30
25	who have been work [prep]	29
26	who have been working [prep]	29
27	who have been elect [prep]	25
28	who have been elected [prep]	25
29	who have been accused [prep]	24
30	who have been accuse [prep]	24