SN4 ""

No	Pattern	Freq
1	[det] could not [adv] be	11
2	[det] could not [adv] be	11
3	[det] could not have be	8
4	[det] could not [vb infin] be	8
5	[det] could not [verb] be	8
6	[det] could not have be	8
7	[conj] [det] could not be	35
8	[that] [det] could not be	16
9	that [det] could not be	16
10	that [det] could not be	16
11	[coord] [det] could not be	15
12	the [det] could not be	14
13	the [det] could not be	14
14	[art] [det] could not be	14
15	[art] [det] could not be	14
16	but [det] could not be	10
17	but [det] could not be	10
18	[adv] [det] could not be	8
19	[adv] [det] could not be	7
20	and [det] could not be	5
21	surely [det] could not be	5
22	surely [det] could not be	5
23	and [det] could not be	5
24	[verb] [det] could not be	5
25	[det] [noun] could not be	97
26	[det] [noun sg] could not be	64
27	[det] [noun pl] could not be	33
28	[det] [pron] could not be	12
29	[det] who could not be	6
30	[det] who could not be	6