SN4 ""

No	Pattern	Freq
1	it is [adv] [vb pp] that [pers pn]	98
2	it is [adv] [vb pp] that it	43
3	it is [adv] [vb pp] that it	43
4	it is [adv] [vb pp] that there	31
5	it is [adv] [vb pp] that [ex0]	31
6	it is [adv] [vb pp] that there	31
7	it is [adv] [vb pp] that they	23
8	it is [adv] [vb pp] that they	23
9	it is often [vb pp] that [pron]	22
10	it is well [vb pp] that [pron]	20
11	it is [adv] known that [pron]	19
12	it is now [vb pp] that [pron]	17
13	it is [adv] said that [pron]	12
14	it is [adv] assumed that [pron]	12
15	it is generally [vb pp] that [pron]	12
16	it is [adv] [vb pp] that you	11
17	it is [adv] [vb pp] that you	11
18	it is [adv] thought that [pron]	10
19	it is [adv] [vb pp] that he	10
20	it is also [vb pp] that [pron]	10
21	it is strongly [vb pp] that [pron]	10
22	it is [adv] accepted that [pron]	10
23	it is [adv] [vb pp] that he	10
24	it is [adv] argued that [pron]	9
25	it is sometimes [vb pp] that [pron]	8
26	it is widely [vb pp] that [pron]	8
27	it is [adv] [vb pp] that [pos pn]	8
28	it is [adv] [vb pp] that we	7
29	it is [adv] [vb pp] that we	7
30	it is [adv] [vb pp] that [indef pn]	7