SN4 ""

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