SN4 ""

No	Pattern	Freq
1	[noun] it be [adv] [adj] that	176
2	[noun] it [be] [adv] [adj] that	174
3	[noun] it [is] [adv] [adj] that	141
4	[noun sg] it [be] [adv] [adj] that	122
5	[noun] it is [adv] [adj] that	121
6	[noun pl] it [be] [adv] [adj] that	45
7	[noun] it was [adv] [adj] that	35
8	[noun] it [was/were] [adv] [adj] that	35
9	[noun] it [be] [adv] surprising that	28
10	[noun] it [be] [adv] surprising that	28
11	[noun] it [be] hardly [adj] that	21
12	[noun] it [be] [adv] important that	20
13	[noun] it 's [adv] [adj] that	20
14	[noun] it [be] [adv] important that	20
15	[noun] it [be] quite [adj] that	20
16	[noun] it [be] [adv] likely that	15
17	[noun] it [be] [adv] likely that	15
18	[noun] it [be] very [adj] that	14
19	[noun] it [be] so [adj] that	12
20	[noun] it [be] [adv] unlikely that	11
21	[noun] it [be] almost [adj] that	11
22	[noun] it [be] [adv] unlikely that	11
23	[noun] it [be] [adv] clear that	10
24	[noun] it [be] most [adj] that	10
25	[noun] it [be] [adv] clear that	10
26	circumstances it [be] [adv] [adj] that	9
27	[noun] it [be] [adv] certain that	9
28	[noun] it [be] [adv] certain that	9
29	circumstance it [be] [adv] [adj] that	9
30	[noun prp] it [be] [adv] [adj] that	8