SN4 ""

No	Pattern	Freq
1	[coord] it is [vb pp] that [det]	61
2	[subord] it is [vb pp] that [det]	52
3	and it is [vb pp] that [det]	41
4	and it is [vb pp] that [det]	41
5	[conj] it is [vb pp] that this	28
6	but it is [vb pp] that [det]	20
7	but it is [vb pp] that [det]	20
8	if it is [vb pp] that [det]	18
9	if it is [vb pp] that [det]	18
10	[conj] it is [vb pp] that some	16
11	[conj] it is [vb pp] that these	15
12	[conj] it is [vb pp] that such	14
13	[conj] it is hoped that [det]	13
14	[conj] it is thought that [det]	11
15	[conj] it is believed that [det]	6
16	although it is [vb pp] that [det]	6
17	although it is [vb pp] that [det]	6
18	[conj] it is known that [det]	6
19	[conj] it is understood that [det]	6
20	[conj] it is [vb pp] that more	6
21	[conj] it is assumed that [det]	6
22	[conj] it is felt that [det]	6
23	though it is [vb pp] that [det]	5
24	[conj] it is [vb pp] that many	5
25	[conj] it is [vb pp] that those	5
26	[conj] it is said that [det]	5
27	[conj] it is [vb pp] that most	5
28	[conj] it is [vb pp] that all	5
29	though it is [vb pp] that [det]	5
30	[conj] it is recognised that [det]	5