SN4 ""

No	Pattern	Freq
1	it is [adv] [verb] that [pron]	170
2	it is [adv] [vb pp] that [pron]	161
3	it is [adv] [verb] that [pron]	156
4	it is [adv] [verb] that [pers pn]	112
5	it is [adv] [verb] that it	45
6	it is [adv] [verb] that it	45
7	it is [adv] [verb] that there	33
8	it is [adv] [verb] that [ex0]	33
9	it is [adv] [verb] that there	33
10	it is [adv] [verb] that they	28
11	it is [adv] [verb] that they	28
12	it is often [verb] that [pron]	22
13	it is often [verb] that [pron]	22
14	it is well [verb] that [pron]	20
15	it is well [verb] that [pron]	20
16	it is [adv] know that [pron]	19
17	it is [adv] known that [pron]	19
18	it is now [verb] that [pron]	17
19	it is now [verb] that [pron]	17
20	it is [not/n't] [verb] that [pron]	14
21	it is not [verb] that [pron]	14
22	it is not [verb] that [pron]	13
23	it is [adv] say that [pron]	13
24	it is [adv] said that [pron]	13
25	it is [adv] [verb] that he	12
26	it is [adv] [verb] that you	12
27	it is [adv] [verb] that he	12
28	it is [adv] assume that [pron]	12
29	it is generally [verb] that [pron]	12
30	it is [adv] [verb] that [pos pn]	12