SN4 ""

No	Pattern	Freq
1	it [verb] that [subord]	206
2	it [verb] that [conj]	206
3	it [vb -s] that [conj]	151
4	it [verb] that if	91
5	it [verb] that if	91
6	it seem that [conj]	47
7	it [vb past] that [conj]	41
8	it seems that [conj]	38
9	it [verb] that when	37
10	it [verb] that when	37
11	it mean that [conj]	36
12	it follow that [conj]	34
13	it follows that [conj]	32
14	it means that [conj]	26
15	it appear that [conj]	18
16	it [verb] that while	16
17	it [verb] that while	16
18	it appears that [conj]	15
19	it [verb] that although	13
20	it [verb] that although	13
21	it say that [conj]	11
22	it [verb] that as	10
23	it [verb] that as	10
24	it [verb] that once	10
25	it [verb] that once	10
26	it seemed that [conj]	9
27	it [to-vb] that [conj]	7
28	it meant that [conj]	6
29	it [verb] that unless	6
30	it [verb] that because	6