SN4 ""

No	Pattern	Freq
1	which had been [vb pp] [prep] the	414
2	which had been [verb] by the	148
3	which had been [verb] in the	71
4	which had been [verb] to the	31
5	which had been [verb] at the	28
6	which had been [verb] on the	24
7	which had been [v-ing] [prep] the	20
8	which had been [verb] from the	17
9	which had been [verb] for the	13
10	which had been build [prep] the	13
11	which had been built [prep] the	13
12	which had been [verb] during the	12
13	which had been [verb] since the	11
14	which had been establish [prep] the	9
15	which had been established [prep] the	9
16	which had been made [prep] the	8
17	which had been closed [prep] the	8
18	which had been [verb] over the	8
19	which had been [verb] into the	8
20	which had been make [prep] the	8
21	which had been [verb] after the	8
22	which had been close [prep] the	8
23	which had been placed [prep] the	7
24	which had been [verb] under the	7
25	which had been [verb] with the	7
26	which had been suspend [prep] the	7
27	which had been place [prep] the	7
28	which had been suspended [prep] the	7
29	which had been prepared [prep] the	6
30	which had been prepare [prep] the	6