SN4 ""

No	Pattern	Freq
1	it is [adj] [to-vb] that [pers pn]	181
2	it is important [to-vb] that [pron]	80
3	it is [adj] [to-vb] that there	79
4	it is [adj] [to-vb] that there	79
5	it is [adj] [to-vb] that [ex0]	79
6	it is [adj] [to-vb] that it	67
7	it is [adj] [to-vb] that it	67
8	it is [adj] [to-vb] that they	41
9	it is [adj] [to-vb] that they	41
10	it is [adj] to say that [pron]	37
11	it is [adj] [to-vb] that he	29
12	it is [adj] to note that [pron]	29
13	it is [adj] [to-vb] that [pos pn]	29
14	it is [adj] [to-vb] that he	29
15	it is [adj] to believe that [pron]	27
16	it is easy [to-vb] that [pron]	26
17	it is reasonable [to-vb] that [pron]	25
18	it is [adj] to remember that [pron]	24
19	it is difficult [to-vb] that [pron]	22
20	it is [adj] [to-vb] that [indef pn]	22
21	it is [adj] to see that [pron]	21
22	it is [adj] [to-vb] that we	20
23	it is [adj] [to-vb] that we	20
24	it is hard [to-vb] that [pron]	20
25	it is interesting [to-vb] that [pron]	16
26	it is [adj] to assume that [pron]	16
27	it is [adj] to know that [pron]	15
28	it is [adj] to realise that [pron]	15
29	it is fair [to-vb] that [pron]	12
30	it is [adj] to imagine that [pron]	12