SN4 ""

No	Pattern	Freq
1	[coord] it is [adv] [vb pp] that	103
2	[subord] it is [adv] [vb pp] that	72
3	and it is [adv] [vb pp] that	59
4	and it is [adv] [vb pp] that	59
5	but it is [adv] [vb pp] that	44
6	but it is [adv] [vb pp] that	44
7	[conj] it is generally [vb pp] that	37
8	[conj] it is now [vb pp] that	29
9	[conj] it is [adv] known that	27
10	[conj] it is well [vb pp] that	22
11	[conj] it is [adv] accepted that	18
12	although it is [adv] [vb pp] that	18
13	although it is [adv] [vb pp] that	18
14	[conj] it is [adv] recognised that	16
15	[conj] it is often [vb pp] that	14
16	[conj] it is [adv] assumed that	14
17	[conj] it is widely [vb pp] that	12
18	as it is [adv] [vb pp] that	10
19	as it is [adv] [vb pp] that	10
20	[that] it is [adv] [vb pp] that	9
21	[conj] it is [adv] believed that	9
22	that it is [adv] [vb pp] that	9
23	that it is [adv] [vb pp] that	9
24	[conj] it is [adv] agreed that	9
25	though it is [adv] [vb pp] that	8
26	though it is [adv] [vb pp] that	8
27	[conj] it is commonly [vb pp] that	7
28	[conj] it is sometimes [vb pp] that	6
29	[conj] it is also [vb pp] that	6
30	since it is [adv] [vb pp] that	6