SN4 ""

No	Pattern	Freq
1	it [is] [adj] that [det]	1075
2	it is [adj] that [det]	1012
3	it [is] [adj] that this	256
4	it [is] likely that [det]	148
5	it [is] clear that [det]	132
6	it [is] [adj] that some	131
7	it [is] [adj] that all	108
8	it [is] possible that [det]	99
9	it [is] [adj] that these	98
10	it [is] unlikely that [det]	94
11	it [is] [adj] that such	92
12	it [is] [adj] that many	86
13	it [is] [adj] that any	82
14	it [is] important that [det]	79
15	it [is] true that [det]	75
16	it 's [adj] that [det]	63
17	it [is] essential that [det]	60
18	it [is] [adj] that most	47
19	it [is] [adj] that those	46
20	it [is] probable that [det]	36
21	it [is] [adj] that that	31
22	it [is] [adj] that both	25
23	it [is] obvious that [det]	23
24	it [is] [adj] that more	22
25	it [is] significant that [det]	22
26	it [is] vital that [det]	21
27	it [is] [adj] that each	18
28	it [is] arguable that [det]	15
29	it [is] interesting that [det]	14
30	it [is] unfortunate that [det]	13