SN4 ""

No	Pattern	Freq
1	[subord] it is [verb] [adv] that	7
2	[subord] it is [adv] [adv] that	7
3	[subord] it is [vb pp] [adv] that	7
4	[subord] it is [adv] [adv] that	6
5	[subord] it is [adv] [adj] that	155
6	[subord] it is [adv] [adj] that	154
7	[subord] it is [adv] [verb] that	85
8	[subord] it is [adv] [vb pp] that	81
9	[subord] it is [adv] surprising that	30
10	[subord] it is [adv] surprising that	30
11	[subord] it is [adv] true that	23
12	[subord] it is [adv] true that	23
13	[subord] it is [adv] clear that	17
14	[subord] it is [adv] clear that	17
15	[subord] it is [adv] possible that	16
16	[subord] it is [adv] possible that	16
17	[subord] it is [adv] know that	13
18	[subord] it is [adv] known that	13
19	[subord] it is [adv] obvious that	8
20	[subord] it is [adv] accept that	8
21	[subord] it is [adv] accepted that	8
22	[subord] it is [adv] unlikely that	8
23	[subord] it is [adv] obvious that	8
24	[subord] it is [adv] unlikely that	8
25	[subord] it is [adv] likely that	7
26	[subord] it is [adv] likely that	7
27	[subord] it is [adv] recognised that	7
28	[subord] it is [adv] recognise that	7
29	[subord] it is [adv] [adv] that	7
30	[subord] it is [adv] [adv] that	7