SN4 ""

No	Pattern	Freq
1	[conj] it is [adv] that [pron]	29
2	[coord] it is [adv] that [pron]	20
3	and it is [adv] that [pron]	19
4	and it is [adv] that [pron]	19
5	[noun] it is [adv] that [pron]	8
6	[verb] it is [adv] that [pron]	7
7	[vb base] it is [adv] that [pron]	5
8	[noun sg] it is [adv] that [pron]	5
9	[subord] it is [adv] that [pron]	5
10	it is [adv] [adv] that [pron]	51
11	it is [adv] [adv] that [pron]	27
12	it is [not/n't] [adv] that [pron]	24
13	it is not [adv] that [pron]	24
14	it is [adj] [adv] that [pron]	22
15	it is [adj] [adv] that [pron]	21
16	it is only [adv] that [pron]	19
17	it is not [adv] that [pron]	19
18	it is only [adv] that [pron]	19
19	it is [verb] [adv] that [pron]	11
20	it is [vb pp] [adv] that [pron]	10
21	it is n't [adv] that [pron]	5
22	it is [adv] [adj] that [pron]	705
23	it is [adv] [adj] that [pron]	698
24	it is [adv] [verb] that [pron]	170
25	it is [adv] [vb pp] that [pron]	161
26	it is [adv] important that [pron]	97
27	it is [adv] important that [pron]	97
28	it is [adv] surprising that [pron]	95
29	it is [adv] surprising that [pron]	95
30	it is [adv] clear that [pron]	68