SN4 ""

No	Pattern	Freq
1	it [be] [adv] [vb pp] that [noun]	370
2	it be [adv] [vb pp] that [noun]	370
3	it [is] [adv] [vb pp] that [noun]	214
4	it is [adv] [vb pp] that [noun]	203
5	it [was/were] [adv] [vb pp] that [noun]	155
6	it was [adv] [vb pp] that [noun]	155
7	it [be] [adv] [vb pp] that [noun prp]	151
8	it [be] [adv] [vb pp] that [noun pl]	111
9	it [be] [adv] [vb pp] that [noun sg]	95
10	it [be] also [vb pp] that [noun]	64
11	it [be] [adv] known that [noun]	52
12	it [be] well [vb pp] that [noun]	52
13	it [be] often [vb pp] that [noun]	43
14	it [be] widely [vb pp] that [noun]	42
15	it [be] generally [vb pp] that [noun]	40
16	it [be] [adv] believed that [noun]	33
17	it [be] [adv] said that [noun]	33
18	it [be] [adv] assumed that [noun]	30
19	it [be] sometimes [vb pp] that [noun]	20
20	it [be] [adv] agreed that [noun]	19
21	it [be] now [vb pp] that [noun]	18
22	it [be] [adv] argued that [noun]	18
23	it [be] [adv] claimed that [noun]	13
24	it [be] [adv] felt that [noun]	13
25	it [be] [adv] accepted that [noun]	12
26	it [be] [adv] thought that [noun]	12
27	it [be] [adv] [vb pp] that [n mass]	12
28	it 's [adv] [vb pp] that [noun]	11
29	it [be] [adv] recognized that [noun]	10
30	it [be] [adv] suggested that [noun]	10