SN4 ""

No	Pattern	Freq
1	it be impossible [verb] [adj]	126
2	it be impossible [to-vb] [adj]	126
3	it be impossible [verb] [det]	88
4	it is impossible [verb] [adj]	86
5	it be impossible [verb] any	38
6	it be impossible [verb] any	38
7	it be impossible [verb] [adj]	37
8	it was impossible [verb] [adj]	33
9	it be impossible [verb] all	14
10	it be impossible [verb] all	14
11	it be impossible [verb] such	8
12	it be impossible [verb] such	8
13	it be impossible to make [adj]	8
14	it be impossible make [adj]	8
15	it be impossible [verb] this	7
16	it be impossible to give [adj]	7
17	it be impossible get [adj]	7
18	it be impossible give [adj]	7
19	it be impossible to get [adj]	7
20	it be impossible [verb] this	7
21	it be impossible to find [adj]	6
22	it be impossible find [adj]	6
23	it 's impossible [verb] [adj]	6
24	it be impossible [verb] these	5
25	it be impossible [verb] these	5
26	it be impossible [verb] that	5
27	it be impossible [verb] that	5