SN4 ""

No	Pattern	Freq
1	it [is] [adj] [to-vb] that [det]	234
2	it is [adj] [to-vb] that [det]	219
3	it [is] [adj] [to-vb] that this	70
4	it [is] important [to-vb] that [det]	63
5	it [is] important [to-vb] that [det]	63
6	it [is] [adj] to note that [det]	37
7	it [is] [adj] [to-vb] that these	28
8	it [is] [adj] [to-vb] that all	27
9	it [is] [adj] to say that [det]	27
10	it [is] [adj] [to-vb] that some	25
11	it [is] interesting [to-vb] that [det]	22
12	it [is] interesting [to-vb] that [det]	22
13	it [is] [adj] to assume that [det]	22
14	it [is] [adj] to remember that [det]	21
15	it [is] [adj] [to-vb] that such	21
16	it 's [adj] [to-vb] that [det]	17
17	it [is] reasonable [to-vb] that [det]	17
18	it [is] reasonable [to-vb] that [det]	17
19	it [is] [adj] [to-vb] that any	15
20	it [is] [adj] [to-vb] that many	15
21	it [is] difficult [to-vb] that [det]	14
22	it [is] [adj] to believe that [det]	14
23	it [is] easy [to-vb] that [det]	14
24	it [is] difficult [to-vb] that [det]	14
25	it [is] easy [to-vb] that [det]	14
26	it [is] fair [to-vb] that [det]	13
27	it [is] fair [to-vb] that [det]	13
28	it [is] hard [to-vb] that [det]	11
29	it [is] hard [to-vb] that [det]	11
30	it [is] [adj] to think that [det]	9