SN4 ""

No	Pattern	Freq
1	it is [adj] [to-vb] that [pron]	323
2	it is [adj] [to-vb] that [pron]	319
3	it is [adj] [to-vb] that [pers pn]	185
4	it is [adj] [to-vb] that there	81
5	it is [adj] [to-vb] that [ex0]	81
6	it is [adj] [to-vb] that there	81
7	it is important [to-vb] that [pron]	80
8	it is important [to-vb] that [pron]	80
9	it is [adj] [to-vb] that it	68
10	it is [adj] [to-vb] that it	68
11	it is [adj] [to-vb] that they	42
12	it is [adj] [to-vb] that they	42
13	it is [adj] to say that [pron]	38
14	it is [adj] [to-vb] that he	29
15	it is [adj] [to-vb] that [pos pn]	29
16	it is [adj] to note that [pron]	29
17	it is [adj] [to-vb] that he	29
18	it is [adj] to believe that [pron]	27
19	it is easy [to-vb] that [pron]	26
20	it is easy [to-vb] that [pron]	26
21	it is reasonable [to-vb] that [pron]	25
22	it is reasonable [to-vb] that [pron]	25
23	it is [adj] to remember that [pron]	24
24	it is difficult [to-vb] that [pron]	22
25	it is [adj] [to-vb] that [indef pn]	22
26	it is difficult [to-vb] that [pron]	22
27	it is hard [to-vb] that [pron]	21
28	it is [adj] to see that [pron]	21
29	it is hard [to-vb] that [pron]	21
30	it is [adj] [to-vb] that we	20