SN4 ""

No	Pattern	Freq
1	it [is] [adv] [vb pp] that [noun]	214
2	it is [adv] [vb pp] that [noun]	203
3	it [is] [adv] [vb pp] that [noun pl]	84
4	it [is] [adv] [vb pp] that [noun sg]	69
5	it [is] [adv] [vb pp] that [noun prp]	52
6	it [is] well [vb pp] that [noun]	46
7	it [is] [adv] known that [noun]	43
8	it [is] often [vb pp] that [noun]	42
9	it [is] [adv] said that [noun]	29
10	it [is] generally [vb pp] that [noun]	22
11	it [is] [adv] assumed that [noun]	21
12	it [is] sometimes [vb pp] that [noun]	20
13	it [is] [adv] argued that [noun]	17
14	it [is] also [vb pp] that [noun]	17
15	it [is] now [vb pp] that [noun]	16
16	it [is] widely [vb pp] that [noun]	14
17	it 's [adv] [vb pp] that [noun]	11
18	it [is] [adv] accepted that [noun]	11
19	it [is] [adv] believed that [noun]	11
20	it [is] [adv] [vb pp] that [n mass]	9
21	it [is] [adv] recognized that [noun]	9
22	it [is] [adv] claimed that [noun]	8
23	it [is] commonly [vb pp] that [noun]	7
24	it [is] [adv] [vb pp] that women	6
25	it [is] [adv] suggested that [noun]	6
26	it [is] [adv] [vb pp] that woman	6
27	it [is] [adv] [vb pp] that child	5
28	it [is] [adv] recognised that [noun]	5
29	it [is] [adv] [vb pp] that people	5
30	it [is] [adv] agreed that [noun]	5