SN4 ""

No	Pattern	Freq
1	it is [vb pp] that [adj]	798
2	it is [verb] that [det]	528
3	it is [verb] that this	220
4	it is [verb] that this	220
5	it is [verb] that [adj]	211
6	it is hope that [adj]	104
7	it is hoped that [adj]	104
8	it is [verb] that [num]	66
9	it is [verb] that these	58
10	it is [verb] that these	58
11	it is suggest that [adj]	53
12	it is suggested that [adj]	52
13	it is [verb] that some	52
14	it is estimate that [adj]	52
15	it is [verb] that some	52
16	it is estimated that [adj]	52
17	it is think that [adj]	46
18	it is thought that [adj]	46
19	it is believe that [adj]	41
20	it is believed that [adj]	41
21	it is say that [adj]	39
22	it is [verb] that such	37
23	it is [verb] that such	37
24	it is said that [adj]	36
25	it is [verb] that all	35
26	it is [verb] that all	35
27	it is argued that [adj]	32
28	it is know that [adj]	32
29	it is argue that [adj]	32
30	it is known that [adj]	32