SN4 ""

No	Pattern	Freq
1	it is [adv] [adv] that [noun pl]	18
2	it is [not/n't] [adv] that [noun pl]	13
3	it is not [adv] that [noun pl]	13
4	it is not [adv] that [noun pl]	12
5	it is [adv] [adv] that [noun pl]	5
6	it is only [adv] that [noun pl]	5
7	it is [adj] [adv] that [noun pl]	5
8	it is only [adv] that [noun pl]	5
9	it is [adj] [adv] that [noun pl]	5
10	it is [adv] [adj] that [noun pl]	136
11	it is [adv] [adj] that [noun pl]	136
12	it is [adv] [verb] that [noun pl]	82
13	it is [adv] [vb pp] that [noun pl]	80
14	it is [adv] important that [noun pl]	22
15	it is [adv] important that [noun pl]	22
16	it is [adv] true that [noun pl]	21
17	it is [adv] true that [noun pl]	21
18	it is [adv] known that [noun pl]	18
19	it is [adv] know that [noun pl]	18
20	it is [adv] surprising that [noun pl]	16
21	it is [adv] surprising that [noun pl]	16
22	it is [adv] likely that [noun pl]	13
23	it is [adv] likely that [noun pl]	13
24	it is [adv] possible that [noun pl]	12
25	it is [adv] possible that [noun pl]	12
26	it is [adv] clear that [noun pl]	10
27	it is [adv] say that [noun pl]	10
28	it is [adv] clear that [noun pl]	10
29	it is [adv] said that [noun pl]	10
30	it is [adv] assume that [noun pl]	9