SN4 ""

No	Pattern	Freq
1	it is [adv] [vb pp] that [noun sg]	69
2	it is [adv] [verb] that [noun sg]	69
3	it is [adv] [verb] that [noun sg]	68
4	it is often [verb] that [noun sg]	14
5	it is often [verb] that [noun sg]	14
6	it is [adv] known that [noun sg]	13
7	it is [adv] know that [noun sg]	13
8	it is [adv] argued that [noun sg]	11
9	it is well [verb] that [noun sg]	11
10	it is [adv] argue that [noun sg]	11
11	it is well [verb] that [noun sg]	11
12	it is generally [verb] that [noun sg]	9
13	it is generally [verb] that [noun sg]	9
14	it is [adv] say that [noun sg]	8
15	it is [adv] assume that [noun sg]	8
16	it is [adv] said that [noun sg]	8
17	it is [adv] assumed that [noun sg]	8
18	it is [adv] recognize that [noun sg]	7
19	it is sometimes [verb] that [noun sg]	7
20	it is sometimes [verb] that [noun sg]	7
21	it is [adv] recognized that [noun sg]	7
22	it is also [verb] that [noun sg]	6
23	it is also [verb] that [noun sg]	6
24	it is [adv] believed that [noun sg]	5
25	it is [adv] claim that [noun sg]	5
26	it is now [verb] that [noun sg]	5
27	it is [adv] claimed that [noun sg]	5
28	it is [adv] believe that [noun sg]	5
29	it is now [verb] that [noun sg]	5