SN4 ""

No	Pattern	Freq
1	have been [vb pp] by a [noun sg]	645
2	had been [vb pp] by a [noun sg]	241
3	has been [vb pp] by a [noun sg]	231
4	have been [vb pp] by an [noun sg]	103
5	have been [vb pp] by a [noun sg]	100
6	have been [vb pp] by a [noun sg]	90
7	have been [vb pp] by a number	43
8	to have been [vb pp] by a [noun sg]	37
9	have been caused by a [noun sg]	30
10	have been replaced by a [noun sg]	29
11	have been hit by a [noun sg]	23
12	have been accompanied by a [noun sg]	22
13	have been [vb pp] by a group	17
14	have been followed by a [noun sg]	17
15	's been [vb pp] by a [noun sg]	15
16	'd been [vb pp] by a [noun sg]	14
17	having been [vb pp] by a [noun sg]	13
18	have been made by a [noun sg]	12
19	have been [vb pp] by a combination	12
20	have been killed by a [noun sg]	11
21	have been taken by a [noun sg]	11
22	have been written by a [noun sg]	11
23	have been [vb pp] by a variety	10
24	have been [vb pp] by a team	9
25	have been approached by a [noun sg]	9
26	have been preceded by a [noun sg]	8
27	have been [vb pp] by a desire	8
28	have been [vb pp] by a couple	7
29	have been developed by a [noun sg]	7
30	have been [vb pp] by a woman	7