SN4 ""

No	Pattern	Freq
1	it be [adv] [vb pp] that	2056
2	it [be] [adv] [vb pp] that	2056
3	it [is] [adv] [vb pp] that	1213
4	it is [adv] [vb pp] that	1169
5	it [was/were] [adv] [vb pp] that	838
6	it was [adv] [vb pp] that	837
7	it [be] also [vb pp] that	356
8	it [be] generally [vb pp] that	245
9	it [be] widely [vb pp] that	200
10	it [be] [adv] known that	189
11	it [be] well [vb pp] that	183
12	it [be] often [vb pp] that	163
13	it [be] [adv] assumed that	145
14	it [be] now [vb pp] that	123
15	it [be] [adv] believed that	122
16	it [be] [adv] accepted that	119
17	it [be] [adv] agreed that	119
18	it [be] [adv] said that	117
19	it [be] sometimes [vb pp] that	99
20	it [be] [adv] argued that	91
21	it [be] [adv] suggested that	87
22	it [be] [adv] thought that	66
23	it [be] [adv] recognised that	61
24	it [be] [adv] reported that	49
25	it [be] [adv] claimed that	47
26	it 's [adv] [vb pp] that	44
27	it [be] [adv] established that	44
28	it [be] [adv] felt that	43
29	it [be] further [vb pp] that	41
30	it [be] commonly [vb pp] that	40