SN4 ""

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