SN4 ""

No	Pattern	Freq
1	which have been [verb] in	548
2	which have been [verb] in	548
3	which have been [vb pp] in	526
4	which had been [verb] in	282
5	which has been [verb] in	137
6	which have been [verb] in	129
7	which have been [v-ing] in	22
8	which have been made in	14
9	which have been use in	14
10	which have been used in	14
11	which have been make in	14
12	which have been described in	12
13	which have been formed in	12
14	which have been form in	12
15	which have been establish in	12
16	which have been established in	12
17	which have been develop in	12
18	which have been describe in	12
19	which have been developed in	11
20	which have been publish in	10
21	which have been published in	10
22	which have been adopt in	9
23	which have been built in	9
24	which have been adopted in	9
25	which have been build in	9
26	which have been hold in	8
27	which have been held in	8
28	which have been find in	7
29	which have been keep in	7
30	which have been kept in	7