SN4 ""

No	Pattern	Freq
1	it [be] [adv] [adj] that a	144
2	it [be] [adv] [adj] that a	144
3	it be [adv] [adj] that a	144
4	it [is] [adv] [adj] that a	124
5	it [be] [adv] [adj] that a	117
6	it is [adv] [adj] that a	114
7	it [be] [adv] likely that a	28
8	it [be] [adv] likely that a	28
9	it [be] [adv] [adj] that an	27
10	it [was/were] [adv] [adj] that a	19
11	it was [adv] [adj] that a	19
12	it [be] [adv] possible that a	16
13	it [be] [adv] unlikely that a	16
14	it [be] also [adj] that a	16
15	it [be] [adv] possible that a	16
16	it [be] [adv] unlikely that a	16
17	it [be] more [adj] that a	14
18	it [be] quite [adj] that a	13
19	it [be] [adv] true that a	12
20	it [be] [adv] true that a	12
21	it [be] very [adj] that a	10
22	it 's [adv] [adj] that a	10
23	it [be] hardly [adj] that a	9
24	it [be] [adv] important that a	8
25	it [be] [adv] clear that a	8
26	it [be] [adv] important that a	8
27	it [be] highly [adj] that a	8
28	it [be] [adv] clear that a	8
29	it [be] [adv] surprising that a	7
30	it [be] almost [adj] that a	7