SN4 ""

No	Pattern	Freq
1	[conj] it is [vb pp] that [det]	113
2	[conj] it is [vb pp] that [det]	113
3	[coord] it is [vb pp] that [det]	61
4	[subord] it is [vb pp] that [det]	52
5	and it is [vb pp] that [det]	41
6	and it is [vb pp] that [det]	41
7	[conj] it is [vb pp] that this	28
8	but it is [vb pp] that [det]	20
9	but it is [vb pp] that [det]	20
10	if it is [vb pp] that [det]	18
11	if it is [vb pp] that [det]	18
12	[conj] it is [vb pp] that some	16
13	[conj] it is [vb pp] that these	15
14	[conj] it is [vb pp] that such	14
15	[conj] it is hoped that [det]	13
16	[conj] it is thought that [det]	11
17	[conj] it is known that [det]	6
18	although it is [vb pp] that [det]	6
19	[conj] it is believed that [det]	6
20	[conj] it is felt that [det]	6
21	[conj] it is assumed that [det]	6
22	although it is [vb pp] that [det]	6
23	[conj] it is understood that [det]	6
24	[conj] it is [vb pp] that more	6
25	[conj] it is [vb pp] that all	5
26	though it is [vb pp] that [det]	5
27	[conj] it is [vb pp] that most	5
28	[conj] it is recognised that [det]	5
29	[conj] it is [vb pp] that many	5
30	though it is [vb pp] that [det]	5