SN4 ""

No	Pattern	Freq
1	it is [adj] that [det] [noun]	506
2	it is [adj] that [adj] [noun pl]	471
3	it is [adj] that [adj] [noun sg]	416
4	it is [adj] that [adj] [noun]	387
5	it is clear that [adj] [noun]	134
6	it is [adj] that this [noun]	119
7	it is [adj] that this [noun]	119
8	it is likely that [adj] [noun]	112
9	it is possible that [adj] [noun]	97
10	it is true that [adj] [noun]	78
11	it is important that [adj] [noun]	72
12	it is unlikely that [adj] [noun]	68
13	it is [adj] that some [noun]	67
14	it is [adj] that some [noun]	67
15	it is [adj] that these [noun]	60
16	it is [adj] that these [noun]	60
17	it is essential that [adj] [noun]	58
18	it is [adj] that such [noun]	55
19	it is [adj] that such [noun]	55
20	it is [adj] that all [noun]	47
21	it is [adj] that all [noun]	47
22	it is [adj] that any [noun]	39
23	it is [adj] that any [noun]	39
24	it is [adj] that [adj] [n mass]	39
25	it is [adj] that many [noun]	31
26	it is [adj] that many [noun]	31
27	it is [adj] that [adj] people	29
28	it is [adj] that [adj] people	29
29	it is probable that [adj] [noun]	25
30	it is vital that [adj] [noun]	24