SN4 ""

No	Pattern	Freq
1	[conj] it is [adv] that [pron]	24
2	[coord] it is [adv] that [pron]	18
3	and it is [adv] that [pron]	17
4	and it is [adv] that [pron]	17
5	[noun] it is [adv] that [pron]	7
6	[verb] it is [adv] that [pron]	6
7	[vb base] it is [adv] that [pron]	5
8	it is [adv] [adv] that [pron]	51
9	it is [adv] [adv] that [pron]	27
10	it is [not/n't] [adv] that [pron]	24
11	it is not [adv] that [pron]	24
12	it is [adj] [adv] that [pron]	21
13	it is [adj] [adv] that [pron]	21
14	it is only [adv] that [pron]	19
15	it is only [adv] that [pron]	19
16	it is not [adv] that [pron]	19
17	it is [vb pp] [adv] that [pron]	7
18	it is [verb] [adv] that [pron]	7
19	it is n't [adv] that [pron]	5
20	it is [adv] [adj] that [pron]	570
21	it is [adv] [adj] that [pron]	565
22	it is [adv] [verb] that [pron]	156
23	it is [adv] [vb pp] that [pron]	149
24	it is [adv] important that [pron]	96
25	it is [adv] important that [pron]	96
26	it is [adv] likely that [pron]	52
27	it is [adv] likely that [pron]	52
28	it is [adv] clear that [pron]	51
29	it is [adv] clear that [pron]	50
30	it is [adv] surprising that [pron]	39