SN4 ""

No	Pattern	Freq
1	have been [vb pp] [prep] some	469
2	has been [verb] [prep] some	222
3	have been [verb] for some	183
4	had been [verb] [prep] some	150
5	have been [verb] by some	145
6	have been [verb] in some	122
7	have been [verb] [prep] some	103
8	have been [v-ing] [prep] some	102
9	have been [verb] [prep] some	45
10	have been [verb] to some	35
11	have been [verb] at some	31
12	have been [verb] with some	29
13	have been known [prep] some	21
14	have been know [prep] some	21
15	to have been [verb] [prep] some	18
16	have been use [prep] some	15
17	have been used [prep] some	15
18	've been [verb] [prep] some	13
19	have been look [prep] some	12
20	have been looking [prep] some	12
21	's been [verb] [prep] some	12
22	have been found [prep] some	9
23	have been find [prep] some	9
24	have been make [prep] some	7
25	have been seen [prep] some	7
26	have been suggest [prep] some	7
27	have been establish [prep] some	7
28	have been recognise [prep] some	7
29	have been see [prep] some	7
30	have been recognised [prep] some	7