SN4 ""

No	Pattern	Freq
1	[conj] it be impossible [verb] [det]	20
2	that it be impossible [verb] [det]	10
3	that it be impossible [verb] [det]	10
4	[that] it be impossible [verb] [det]	10
5	[noun] it be impossible [verb] [det]	8
6	[noun sg] it be impossible [verb] [det]	7
7	[subord] it be impossible [verb] [det]	7
8	it [vb mod] be impossible [verb] [det]	15
9	it [modal v] be impossible [verb] [det]	15
10	it would be impossible [verb] [det]	10
11	it would be impossible [verb] [det]	10
12	it be [adv] impossible [verb] [det]	23
13	it be [adv] impossible [verb] [det]	23
14	it be almost impossible [verb] [det]	5
15	it be almost impossible [verb] [det]	5
16	it be impossible [verb] [adv] [det]	21
17	it be impossible [verb] [prep] [det]	18
18	it be impossible [verb] [prep] [det]	18
19	it be impossible [verb] [Wh adv] [det]	15
20	it be impossible [verb] how [det]	13
21	it be impossible [verb] how [det]	13
22	it be impossible [verb] [conj] [det]	11
23	it be impossible [verb] [subord] [det]	8
24	it be impossible [verb] whether [det]	6
25	it be impossible [verb] whether [det]	6
26	it be impossible [verb] with [det]	5
27	it be impossible [verb] [pron] [det]	5
28	it be impossible [verb] with [det]	5
29	it be impossible [verb] [det] [noun]	37
30	it be impossible [verb] [det] [adj]	27