SN4 ""

No	Pattern	Freq
1	who have been [adj]	595
2	who have been [adj]	553
3	who had been [adj]	310
4	who have been [adj]	152
5	who has been [adj]	98
6	who have been involved	71
7	who have been involved	71
8	who have been unable	29
9	who have been unable	29
10	who have been responsible	25
11	who have been responsible	25
12	who have been unemployed	23
13	who have been unemployed	23
14	who have been able	22
15	who have been able	22
16	who have been [num]	21
17	who have been one	16
18	who have been one	16
19	who 's been [adj]	13
20	who 've been [adj]	13
21	who have been active	12
22	who have been active	12
23	who have been present	12
24	who have been present	12
25	who have been instrumental	11
26	who have been instrumental	11
27	who have been successful	10
28	who have been prime	10
29	who have been prime	10
30	who have been successful	10