SN4 ""

No	Pattern	Freq
1	[pron] would have been impossible	37
2	it would have been impossible	30
3	[pers pn] would have been impossible	30
4	it would have been impossible	30
5	[noun] would have been impossible	24
6	[noun sg] would have been impossible	14
7	[noun pl] would have been impossible	8
8	[adj] would have been impossible	8
9	which would have been impossible	7
10	which would have been impossible	7
11	[Wh det] would have been impossible	7
12	[that] would have been impossible	5
13	[det] would have been impossible	5
14	that would have been impossible	5
15	that would have been impossible	5
16	[conj] would have been impossible	5
17	would have been [adv] impossible	18
18	would have been [adv] impossible	18
19	would have been almost impossible	8
20	would have been almost impossible	8
21	would have been quite impossible	5
22	would have been quite impossible	5
23	would have been impossible [prep]	38
24	would have been impossible [prep]	38
25	would have been impossible [verb]	23
26	would have been impossible [to-vb]	23
27	would have been impossible without	13
28	would have been impossible without	13
29	would have been impossible for	12
30	would have been impossible for	12