SN4 ""

No	Pattern	Freq
1	[conj] it is [adv] that [det]	6
2	it is [adj] [adv] that [det]	9
3	it is [adj] [adv] that [det]	9
4	it is [adv] [adv] that [det]	9
5	it is not [adv] that [det]	6
6	it is not [adv] that [det]	6
7	it is [not/n't] [adv] that [det]	6
8	it is [adv] [adj] that [det]	298
9	it is [adv] [adj] that [det]	297
10	it is [adv] [verb] that [det]	141
11	it is [adv] [vb pp] that [det]	133
12	it is [adv] true that [det]	36
13	it is [adv] true that [det]	36
14	it is [adv] possible that [det]	31
15	it is [adv] possible that [det]	31
16	it is [adv] likely that [det]	29
17	it is [adv] likely that [det]	29
18	it is [adv] unlikely that [det]	29
19	it is [adv] unlikely that [det]	29
20	it is [adv] clear that [det]	29
21	it is [adv] clear that [det]	29
22	it is [adv] important that [det]	20
23	it is [adv] important that [det]	20
24	it is [adv] assume that [det]	17
25	it is [adv] assumed that [det]	17
26	it is [adv] surprising that [det]	16
27	it is [adv] know that [det]	16
28	it is [adv] surprising that [det]	16
29	it is [adv] known that [det]	16
30	it is [adv] accept that [det]	14