SN4 ""

No	Pattern	Freq
1	have been [verb] [prep] some	572
2	have been [vb pp] [prep] some	469
3	has been [verb] [prep] some	222
4	have been [verb] for some	183
5	have been [verb] for some	183
6	had been [verb] [prep] some	150
7	have been [verb] by some	145
8	have been [verb] by some	145
9	have been [verb] in some	122
10	have been [verb] in some	122
11	have been [verb] [prep] some	103
12	have been [v-ing] [prep] some	102
13	have been [verb] [prep] some	45
14	have been [verb] to some	35
15	have been [verb] to some	35
16	have been [verb] at some	31
17	have been [verb] at some	31
18	have been [verb] with some	29
19	have been [verb] with some	29
20	have been known [prep] some	21
21	have been know [prep] some	21
22	to have been [verb] [prep] some	18
23	have been used [prep] some	15
24	have been use [prep] some	15
25	've been [verb] [prep] some	13
26	have been look [prep] some	12
27	's been [verb] [prep] some	12
28	have been looking [prep] some	12
29	have been found [prep] some	9
30	have been find [prep] some	9