SN4 ""

No	Pattern	Freq
1	it be [adj] that [det] [noun]	584
2	it [is] [adj] that [det] [noun]	530
3	it is [adj] that [det] [noun]	506
4	it [be] [adj] that [det] [noun sg]	279
5	it [be] [adj] that [det] [noun pl]	271
6	it [be] [adj] that this [noun]	143
7	it [be] clear that [det] [noun]	86
8	it [be] [adj] that some [noun]	83
9	it [be] likely that [det] [noun]	72
10	it [be] [adj] that these [noun]	66
11	it [be] [adj] that such [noun]	61
12	it was [adj] that [det] [noun]	54
13	it [was/were] [adj] that [det] [noun]	54
14	it [be] [adj] that all [noun]	51
15	it [be] possible that [det] [noun]	49
16	it [be] unlikely that [det] [noun]	47
17	it [be] [adj] that any [noun]	46
18	it [be] important that [det] [noun]	45
19	it [be] true that [det] [noun]	42
20	it [be] essential that [det] [noun]	40
21	it [be] [adj] that many [noun]	36
22	it [be] [adj] that [det] [n mass]	29
23	it 's [adj] that [det] [noun]	24
24	it [be] [adj] that [det] people	23
25	it [be] [adj] that [det] people	23
26	it [be] [adj] that most [noun]	22
27	it [be] vital that [det] [noun]	17
28	it [be] probable that [det] [noun]	16
29	it [be] [adj] that that [noun]	15
30	it [be] [adj] that both [noun]	13