SN4 ""

No	Pattern	Freq
1	[conj] it is [adv] [adj] that	471
2	[conj] it is [adv] [adj] that	470
3	[conj] it is [adv] [verb] that	190
4	[conj] it is [adv] [vb pp] that	184
5	[conj] it is [adv] true that	58
6	[conj] it is [adv] true that	58
7	[conj] it is [adv] likely that	51
8	[conj] it is [adv] likely that	51
9	[conj] it is [adv] clear that	49
10	[conj] it is [adv] clear that	49
11	[conj] it is [adv] possible that	45
12	[conj] it is [adv] possible that	45
13	[conj] it is [adv] unlikely that	40
14	[conj] it is [adv] unlikely that	40
15	[conj] it is [adv] know that	27
16	[conj] it is [adv] surprising that	27
17	[conj] it is [adv] surprising that	27
18	[conj] it is [adv] known that	27
19	[conj] it is [adv] [adv] that	22
20	[conj] it is [adv] [adv] that	22
21	[conj] it is [adv] important that	19
22	[conj] it is [adv] important that	19
23	[conj] it is [adv] accepted that	18
24	[conj] it is [adv] accept that	18
25	[conj] it is [adv] recognise that	16
26	[conj] it is [adv] recognised that	16
27	[conj] it is [adv] certain that	15
28	[conj] it is [adv] certain that	15
29	[conj] it is [adv] essential that	14
30	[conj] it is [adv] essential that	14