SN4 ""

No	Pattern	Freq
1	it is [adv] [verb] that [noun]	207
2	it is [adv] [vb pp] that [noun]	203
3	it is [adv] [verb] that [noun pl]	82
4	it is [adv] [verb] that [noun sg]	68
5	it is [adv] [verb] that [noun prp]	48
6	it is well [verb] that [noun]	44
7	it is often [verb] that [noun]	42
8	it is [adv] know that [noun]	38
9	it is [adv] known that [noun]	38
10	it is [adv] say that [noun]	28
11	it is [adv] said that [noun]	28
12	it is generally [verb] that [noun]	22
13	it is [adv] assume that [noun]	21
14	it is [adv] assumed that [noun]	21
15	it is sometimes [verb] that [noun]	20
16	it is [adv] argue that [noun]	17
17	it is [adv] argued that [noun]	17
18	it is also [verb] that [noun]	16
19	it is widely [verb] that [noun]	14
20	it is now [verb] that [noun]	13
21	it is [adv] accept that [noun]	11
22	it is [adv] accepted that [noun]	11
23	it is [adv] believed that [noun]	11
24	it is [adv] believe that [noun]	11
25	it is [adv] recognized that [noun]	9
26	it is [adv] [verb] that [n mass]	9
27	it is [adv] recognize that [noun]	9
28	it is [adv] claim that [noun]	8
29	it is [adv] claimed that [noun]	8
30	it is [adv] [verb] that women	6