SN4 ""

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