SN4 ""

No	Pattern	Freq
1	it [be] [adv] [vb pp] that [noun pl]	111
2	it be [adv] [vb pp] that [noun pl]	111
3	it [is] [adv] [vb pp] that [noun pl]	84
4	it is [adv] [vb pp] that [noun pl]	80
5	it was [adv] [vb pp] that [noun pl]	27
6	it [was/were] [adv] [vb pp] that [noun pl]	27
7	it [be] well [vb pp] that [noun pl]	26
8	it [be] [adv] known that [noun pl]	19
9	it [be] also [vb pp] that [noun pl]	19
10	it [be] often [vb pp] that [noun pl]	17
11	it [be] [adv] said that [noun pl]	13
12	it [be] generally [vb pp] that [noun pl]	11
13	it [be] [adv] assumed that [noun pl]	9
14	it [be] [adv] [vb pp] that women	8
15	it [be] sometimes [vb pp] that [noun pl]	7
16	it [be] [adv] accepted that [noun pl]	7
17	it [be] [adv] argued that [noun pl]	5
18	it [be] [adv] suggested that [noun pl]	5
19	it [be] widely [vb pp] that [noun pl]	5