SN4 ""

No	Pattern	Freq
1	[pron] could not do [prep]	25
2	[pers pn] could not do [prep]	24
3	we could not do [prep]	6
4	we could not do [prep]	6
5	[noun] could not do [prep]	5
6	could not be do [prep]	21
7	could not be do [prep]	21
8	could not [be] do [prep]	21
9	could not [be] do [prep]	21
10	could not [verb] do [prep]	5
11	could not [vb infin] do [prep]	5
12	could not do [pron] [prep]	61
13	could not do [indef pn] [prep]	42
14	could not do anything [prep]	35
15	could not do anything [prep]	35
16	could not do [adj] [prep]	27
17	could not do [det] [prep]	27
18	could not do it [prep]	19
19	could not do it [prep]	19
20	could not do [pers pn] [prep]	19
21	could not do that [prep]	16
22	could not do that [prep]	16
23	could not do [adv] [prep]	15
24	could not do [adv] [prep]	15
25	could not do so [prep]	7
26	could not do so [prep]	7
27	could not do much [prep]	6
28	could not do much [prep]	6
29	could not do this [prep]	5
30	could not do enough [prep]	5