SN4 ""

No	Pattern	Freq
1	have been [verb] to be	621
2	have [been] [vb pp] to be	612
3	has [been] [verb] to be	279
4	have [been] [verb] to be	184
5	have [been] show to be	176
6	have [been] shown to be	176
7	have [been] find to be	143
8	have [been] found to be	143
9	had [been] [verb] to be	103
10	have [been] hold to be	28
11	have [been] held to be	28
12	have [been] [verb] to be	24
13	have [been] reported to be	23
14	have [been] report to be	23
15	have [been] prove to be	19
16	having [been] [verb] to be	17
17	have [been] designed to be	16
18	have [been] design to be	16
19	have [been] proved to be	14
20	have [been] considered to be	12
21	have [been] consider to be	12
22	have [been] expect to be	12
23	have [been] said to be	12
24	have [been] say to be	12
25	have [been] assume to be	11
26	have [been] assumed to be	11
27	have [been] expected to be	11
28	have [been] think to be	10
29	have [been] thought to be	10
30	have [been] know to be	9