SN4 ""

No	Pattern	Freq
1	it is [adv] that [adj] [noun]	11
2	it is [adv] that [adj] [noun sg]	6
3	[conj] it is [adv] that [adj]	8
4	[coord] it is [adv] that [adj]	5
5	it is [adj] [adv] that [adj]	11
6	it is [adj] [adv] that [adj]	11
7	it is [adv] [adv] that [adj]	10
8	it is not [adv] that [adj]	6
9	it is [not/n't] [adv] that [adj]	6
10	it is not [adv] that [adj]	6
11	it is [adv] [adj] that [adj]	475
12	it is [adv] [adj] that [adj]	473
13	it is [adv] [verb] that [adj]	249
14	it is [adv] [vb pp] that [adj]	240
15	it is [adv] likely that [adj]	53
16	it is [adv] likely that [adj]	52
17	it is [adv] possible that [adj]	48
18	it is [adv] possible that [adj]	48
19	it is [adv] clear that [adj]	47
20	it is [adv] clear that [adj]	47
21	it is [adv] true that [adj]	46
22	it is [adv] true that [adj]	46
23	it is [adv] surprising that [adj]	37
24	it is [adv] surprising that [adj]	37
25	it is [adv] unlikely that [adj]	36
26	it is [adv] unlikely that [adj]	36
27	it is [adv] important that [adj]	35
28	it is [adv] important that [adj]	35
29	it is [adv] know that [adj]	31
30	it is [adv] known that [adj]	31