SN4 ""

No	Pattern	Freq
1	it is [adj] that [adj] [noun]	936
2	it is [adj] that [det] [noun]	506
3	it is [adj] that [adj] [noun pl]	471
4	it is [adj] that [adj] [noun sg]	417
5	it is [adj] that [adj] [noun]	388
6	it is clear that [adj] [noun]	134
7	it is clear that [adj] [noun]	134
8	it is [adj] that this [noun]	119
9	it is [adj] that this [noun]	119
10	it is likely that [adj] [noun]	112
11	it is likely that [adj] [noun]	112
12	it is possible that [adj] [noun]	97
13	it is possible that [adj] [noun]	97
14	it is true that [adj] [noun]	78
15	it is true that [adj] [noun]	78
16	it is important that [adj] [noun]	72
17	it is important that [adj] [noun]	72
18	it is unlikely that [adj] [noun]	68
19	it is unlikely that [adj] [noun]	68
20	it is [adj] that some [noun]	67
21	it is [adj] that some [noun]	67
22	it is [adj] that these [noun]	60
23	it is [adj] that these [noun]	60
24	it is essential that [adj] [noun]	58
25	it is essential that [adj] [noun]	58
26	it is [adj] that such [noun]	55
27	it is [adj] that such [noun]	55
28	it is [adj] that all [noun]	47
29	it is [adj] that all [noun]	47
30	it is [adj] that [adj] [n mass]	39