SN4 ""

No	Pattern	Freq
1	and [noun] could not be	32
2	and [adv] could not be	23
3	and [adv] could not be	23
4	and [noun sg] could not be	16
5	and [pron] could not be	15
6	and [pers pn] could not be	14
7	and [noun pl] could not be	12
8	and it could not be	9
9	and it could not be	9
10	and therefore could not be	8
11	and therefore could not be	8
12	and [adj] could not be	7
13	and so could not be	6
14	and so could not be	6
15	[noun] and could not be	38
16	[noun sg] and could not be	29
17	[adj] and could not be	14
18	[adj] and could not be	13
19	[verb] and could not be	13
20	[vb pp] and could not be	8
21	[adv] and could not be	8
22	[noun pl] and could not be	5
23	[modal v] and could not be	5
24	[vb mod] and could not be	5
25	could and could not be	5
26	could and could not be	5
27	and could not [adv] be	15
28	and could not [vb infin] be	15
29	and could not [adv] be	15
30	and could not [verb] be	15