SN4 ""

No	Pattern	Freq
1	it [adj] [to-vb] that	178
2	it [adj] to believe that	71
3	it hard [to-vb] that	55
4	it hard [to-vb] that	54
5	it difficult [to-vb] that	41
6	it difficult [to-vb] that	41
7	it [adj] to say that	15
8	it impossible [to-vb] that	14
9	it impossible [to-vb] that	14
10	it easy [to-vb] that	13
11	it possible [to-vb] that	12
12	it possible [to-vb] that	12
13	it [adj] to accept that	11
14	it [adj] to assume that	11
15	it [adj -er] [to-vb] that	10
16	it necessary [to-vb] that	8
17	it necessary [to-vb] that	8
18	it [adj] to ensure that	7
19	it easier [to-vb] that	7
20	it [adj] to show that	6
21	it easy [to-vb] that	6
22	it [adj] to argue that	6
23	it fair [to-vb] that	5
24	it [adj] to imagine that	5
25	it fair [to-vb] that	5