SN4 ""

No	Pattern	Freq
1	it [verb] that [det] [noun]	236
2	it [vb -s] that [det] [noun]	167
3	it seem that [det] [noun]	63
4	it seems that [det] [noun]	56
5	it [vb past] that [det] [noun]	56
6	it [adj] that [det] [noun]	50
7	it [adj] that [det] [noun]	50
8	it follow that [det] [noun]	32
9	it appear that [det] [noun]	31
10	it clear that [det] [noun]	26
11	it clear that [det] [noun]	26
12	it follows that [det] [noun]	25
13	it appears that [det] [noun]	24
14	it [be] that [det] [noun]	23
15	it be that [det] [noun]	23
16	it [is] that [det] [noun]	16
17	it is that [det] [noun]	15
18	it mean that [det] [noun]	13
19	it suggest that [det] [noun]	10
20	it say that [det] [noun]	10
21	it means that [det] [noun]	10
22	it appeared that [det] [noun]	7
23	it seemed that [det] [noun]	7
24	it imply that [det] [noun]	6
25	it followed that [det] [noun]	6
26	it suggests that [det] [noun]	5
27	it [was/were] that [det] [noun]	5
28	it [to-vb] that [det] [noun]	5
29	it was that [det] [noun]	5
30	it [adv] that [det] [noun]	5