SN4 ""

No	Pattern	Freq
1	it is [adj] that [det] [noun sg]	239
2	it is [adj] that [det] [noun pl]	237
3	it is [adj] that this [noun]	119
4	it is clear that [det] [noun]	69
5	it is likely that [det] [noun]	68
6	it is [adj] that some [noun]	67
7	it is [adj] that these [noun]	60
8	it is [adj] that such [noun]	55
9	it is [adj] that all [noun]	47
10	it is possible that [det] [noun]	44
11	it is unlikely that [det] [noun]	43
12	it is [adj] that any [noun]	39
13	it is important that [det] [noun]	38
14	it is true that [det] [noun]	37
15	it is essential that [det] [noun]	37
16	it is [adj] that many [noun]	31
17	it is [adj] that [det] [n mass]	26
18	it is [adj] that most [noun]	21
19	it is [adj] that [det] people	20
20	it is [adj] that [det] people	20
21	it is probable that [det] [noun]	15
22	it is vital that [det] [noun]	14
23	it is [adj] that each [noun]	13
24	it is [adj] that that [noun]	12
25	it is [adj] that those [noun]	12
26	it is [adj] that both [noun]	11
27	it is obvious that [det] [noun]	9
28	it is unfortunate that [det] [noun]	8
29	it is [adj] that [det] form	8
30	it is [adj] that [det] country	7