SN4 ""

No	Pattern	Freq
1	have been [vb pp] [prep] an [noun sg]	388
2	has been [vb pp] [prep] an [noun]	154
3	had been [vb pp] [prep] an [noun]	150
4	have been [vb pp] by an [noun]	110
5	have been [vb pp] as an [noun]	77
6	have been [vb pp] in an [noun]	73
7	have been [vb pp] [prep] an [noun]	52
8	have been [vb pp] to an [noun]	31
9	have been [vb pp] [prep] an [noun]	30
10	have been [vb pp] with an [noun]	27
11	have been [vb pp] [prep] an [noun prp]	24
12	have been [vb pp] for an [noun]	19
13	have been killed [prep] an [noun]	19
14	have been [vb pp] [prep] an attempt	17
15	have been [vb pp] [prep] an attempt	17
16	have been [vb pp] into an [noun]	16
17	have been [vb pp] of an [noun]	13
18	to have been [vb pp] [prep] an [noun]	13
19	have been [vb pp] on an [noun]	13
20	have been [vb pp] [prep] an attack	12
21	have been [vb pp] [prep] an attack	12
22	have been used [prep] an [noun]	12
23	have been [vb pp] [prep] an area	10
24	have been made [prep] an [noun]	10
25	have been [vb pp] [prep] an area	10
26	have been seen [prep] an [noun]	9
27	have been [vb pp] [prep] an article	7
28	have been [vb pp] [prep] an article	7
29	have been [vb pp] at an [noun]	7
30	have been [vb pp] [prep] an offence	7