SN4 ""

No	Pattern	Freq
1	[verb] been referred to	110
2	have been referred to	110
3	[vb -s] been referred to	55
4	has been referred to	51
5	[adv] been referred to	45
6	[adv] been referred to	42
7	had been referred to	24
8	[vb past] been referred to	24
9	already been referred to	21
10	already been referred to	21
11	[vb base] been referred to	20
12	have been referred to	19
13	[vb infin] been referred to	6
14	have been referred to	6
15	having been referred to	5
16	[v-ing] been referred to	5
17	been [adv] referred to	10
18	been [adv] referred to	10
19	been referred to [prep]	48
20	been referred to [prep]	48
21	been referred to [art]	43
22	been referred to [art]	43
23	been referred to the	32
24	been referred to the	32
25	been referred to as	22
26	been referred to as	22
27	been referred to [adv]	17
28	been referred to [adv]	17
29	been referred to in	15
30	been referred to in	15