SN4 ""

No	Pattern	Freq
1	it [is] [adv] [vb pp] that	1287
2	it is [adv] [vb pp] that	1240
3	it [is] [adv] [vb pp] that	1213
4	it [is] generally [vb pp] that	168
5	it [is] generally [vb pp] that	168
6	it [is] well [vb pp] that	165
7	it [is] well [vb pp] that	165
8	it [is] [adv] known that	160
9	it [is] often [vb pp] that	154
10	it [is] often [vb pp] that	154
11	it [is] [adv] assumed that	112
12	it [is] also [vb pp] that	111
13	it [is] also [vb pp] that	111
14	it [is] now [vb pp] that	110
15	it [is] now [vb pp] that	110
16	it [is] [adv] said that	102
17	it [is] sometimes [vb pp] that	97
18	it [is] sometimes [vb pp] that	97
19	it [is] [adv] accepted that	91
20	it [is] widely [vb pp] that	89
21	it [is] widely [vb pp] that	89
22	it [is] [adv] argued that	76
23	it [is] not [vb pp] that	74
24	it [is] [not/n't] [vb pp] that	74
25	it [is] not [vb pp] that	73
26	it [is] [adv] suggested that	70
27	it [is] [adv] believed that	56
28	it [is] [adv] recognised that	49
29	it 's [adv] [vb pp] that	47
30	it [is] [adv] thought that	45