SN4 ""

No	Pattern	Freq
1	it [be] [adv] [verb] that [noun]	400
2	it be [adv] [verb] that [noun]	400
3	it [be] [adv] [vb pp] that [noun]	386
4	it [be] [adv] [verb] that [noun]	382
5	it [is] [adv] [verb] that [noun]	233
6	it is [adv] [verb] that [noun]	218
7	it [was/were] [adv] [verb] that [noun]	166
8	it was [adv] [verb] that [noun]	165
9	it [be] [adv] [verb] that [noun prp]	165
10	it [be] [adv] [verb] that [noun pl]	121
11	it [be] [adv] [verb] that [noun sg]	99
12	it [be] also [verb] that [noun]	65
13	it [be] also [verb] that [noun]	65
14	it [be] [adv] know that [noun]	55
15	it [be] [adv] known that [noun]	55
16	it [be] well [verb] that [noun]	52
17	it [be] well [verb] that [noun]	52
18	it [be] often [verb] that [noun]	43
19	it [be] often [verb] that [noun]	43
20	it [be] widely [verb] that [noun]	42
21	it [be] widely [verb] that [noun]	42
22	it [be] generally [verb] that [noun]	40
23	it [be] generally [verb] that [noun]	40
24	it [be] [adv] said that [noun]	33
25	it [be] [adv] say that [noun]	33
26	it [be] [adv] believe that [noun]	33
27	it [be] [adv] believed that [noun]	33
28	it [be] [adv] assume that [noun]	31
29	it [be] [adv] assumed that [noun]	31
30	it [be] sometimes [verb] that [noun]	20