SN4 ""

No	Pattern	Freq
1	it is [adv] [verb] that [det]	158
2	it is [adv] [vb pp] that [det]	149
3	it is [adv] [verb] that [det]	141
4	it is [adv] [verb] that this	45
5	it is generally [verb] that [det]	21
6	it is generally [verb] that [det]	21
7	it is [adv] [verb] that such	19
8	it is [not/n't] [verb] that [det]	17
9	it is [adv] [verb] that these	17
10	it is [adv] assumed that [det]	17
11	it is not [verb] that [det]	17
12	it is not [verb] that [det]	17
13	it is [adv] known that [det]	17
14	it is [adv] know that [det]	17
15	it is [adv] assume that [det]	17
16	it is [adv] [verb] that all	15
17	it is [adv] accept that [det]	14
18	it is well [verb] that [det]	14
19	it is well [verb] that [det]	14
20	it is [adv] accepted that [det]	14
21	it is [adv] [verb] that any	13
22	it is often [verb] that [det]	13
23	it is [adv] [verb] that some	13
24	it is often [verb] that [det]	13
25	it is [adv] [verb] that many	11
26	it is also [verb] that [det]	11
27	it is also [verb] that [det]	11
28	it is now [verb] that [det]	11
29	it is now [verb] that [det]	11
30	it is [adv] say that [det]	10