SN4 ""

No	Pattern	Freq
1	[be] it that [det] [adj]	7
2	be it that [det] [adj]	7
3	[verb] it that [det] [adj]	5
4	it [verb] that [det] [adj]	85
5	it [vb -s] that [det] [adj]	63
6	it seem that [det] [adj]	27
7	it seems that [det] [adj]	25
8	it [adj] that [det] [adj]	20
9	it [adj] that [det] [adj]	20
10	it [be] that [det] [adj]	17
11	it [vb past] that [det] [adj]	17
12	it be that [det] [adj]	17
13	it follow that [det] [adj]	12
14	it appear that [det] [adj]	11
15	it follows that [det] [adj]	10
16	it [is] that [det] [adj]	9
17	it clear that [det] [adj]	9
18	it clear that [det] [adj]	9
19	it is that [det] [adj]	7
20	it appears that [det] [adj]	7
21	it that [det] [adj] [noun]	9
22	it that [det] [adj] [noun sg]	6