SN4 ""

No	Pattern	Freq
1	it is [adv] [vb pp] that [noun]	203
2	it is [adv] [vb pp] that [noun pl]	80
3	it is [adv] [vb pp] that [noun sg]	68
4	it is [adv] [vb pp] that [noun prp]	46
5	it is well [vb pp] that [noun]	44
6	it is often [vb pp] that [noun]	42
7	it is [adv] known that [noun]	38
8	it is [adv] said that [noun]	28
9	it is generally [vb pp] that [noun]	22
10	it is [adv] assumed that [noun]	21
11	it is sometimes [vb pp] that [noun]	20
12	it is [adv] argued that [noun]	17
13	it is also [vb pp] that [noun]	16
14	it is widely [vb pp] that [noun]	14
15	it is now [vb pp] that [noun]	13
16	it is [adv] accepted that [noun]	11
17	it is [adv] believed that [noun]	11
18	it is [adv] recognized that [noun]	9
19	it is [adv] [vb pp] that [n mass]	9
20	it is [adv] claimed that [noun]	8
21	it is commonly [vb pp] that [noun]	6
22	it is [adv] suggested that [noun]	6
23	it is [adv] recognised that [noun]	5
24	it is [adv] [vb pp] that people	5
25	it is [adv] [vb pp] that women	5
26	it is [adv] [vb pp] that woman	5
27	it is [adv] thought that [noun]	5
28	it is [adv] [vb pp] that child	5
29	it is [adv] established that [noun]	5
30	it is [adv] [vb pp] that people	5