SN4 ""

No	Pattern	Freq
1	it is [adj] that [det] [noun]	506
2	it is [adj] that [det] [noun]	506
3	it is [verb] that [det] [noun]	254
4	it is [vb pp] that [det] [noun]	250
5	it is clear that [det] [noun]	69
6	it is clear that [det] [noun]	69
7	it is likely that [det] [noun]	68
8	it is likely that [det] [noun]	68
9	it is possible that [det] [noun]	44
10	it is possible that [det] [noun]	44
11	it is unlikely that [det] [noun]	43
12	it is unlikely that [det] [noun]	43
13	it is hoped that [det] [noun]	41
14	it is hope that [det] [noun]	41
15	it is important that [det] [noun]	38
16	it is important that [det] [noun]	38
17	it is true that [det] [noun]	37
18	it is essential that [det] [noun]	37
19	it is true that [det] [noun]	37
20	it is essential that [det] [noun]	37
21	it is [adv] that [det] [noun]	18
22	it is suggested that [det] [noun]	16
23	it is suggest that [det] [noun]	16
24	it is anticipate that [det] [noun]	15
25	it is anticipated that [det] [noun]	15
26	it is probable that [det] [noun]	15
27	it is probable that [det] [noun]	15
28	it is vital that [det] [noun]	14
29	it is vital that [det] [noun]	14
30	it is expect that [det] [noun]	13