SN4 ""

No	Pattern	Freq
1	have been [verb] to [adv]	128
2	have been [vb pp] to [adv]	121
3	has been [verb] to [adv]	56
4	have been [verb] to [adv]	29
5	had been [verb] to [adv]	24
6	have been refer to [adv]	15
7	have been referred to [adv]	14
8	have been [verb] to [adv]	10
9	have been subject to [adv]	10
10	have been subjected to [adv]	10
11	have been [verb] to both	9
12	have been shown to [adv]	7
13	have been [verb] to only	7
14	have been [verb] to more	7
15	have been show to [adv]	7
16	have been reduce to [adv]	7
17	have been reduced to [adv]	7
18	have been [v-ing] to [adv]	7
19	have been [verb] to as	6
20	have been [verb] to either	6
21	have been [verb] to over	5
22	have been [verb] to about	5