SN4 ""

No	Pattern	Freq
1	it be [adj] [to-vb] that [adj]	368
2	it [is] [adj] [to-vb] that [adj]	339
3	it is [adj] [to-vb] that [adj]	316
4	it [be] [adj] [to-vb] that [det]	258
5	it [be] important [to-vb] that [adj]	84
6	it [be] [adj] [to-vb] that this	78
7	it [be] [adj] [to-vb] that this	78
8	it [be] [adj] [to-vb] that [adj]	75
9	it [be] [adj] to note that [adj]	55
10	it [be] [adj] to say that [adj]	41
11	it [be] interesting [to-vb] that [adj]	34
12	it [be] [adj] to believe that [adj]	33
13	it [be] [adj] to remember that [adj]	32
14	it [be] [adj] [to-vb] that [num]	31
15	it [be] [adj] [to-vb] that all	30
16	it [be] [adj] [to-vb] that all	30
17	it [be] [adj] [to-vb] that these	29
18	it [be] [adj] [to-vb] that these	29
19	it [be] [adj] to assume that [adj]	27
20	it [be] [adj] [to-vb] that some	27
21	it [be] [adj] [to-vb] that some	27
22	it [was/were] [adj] [to-vb] that [adj]	26
23	it was [adj] [to-vb] that [adj]	26
24	it [be] reasonable [to-vb] that [adj]	26
25	it [be] hard [to-vb] that [adj]	25
26	it [be] difficult [to-vb] that [adj]	24
27	it 's [adj] [to-vb] that [adj]	23
28	it [be] [adj] [to-vb] that such	22
29	it [be] [adj] [to-vb] that such	22
30	it [be] easy [to-vb] that [adj]	21