SN4 ""

No	Pattern	Freq
1	[verb] and [pron] could	203
2	[verb] and [pers pn] could	179
3	[vb pp] and [pron] could	78
4	[verb] and i could	49
5	[verb] and i could	49
6	[verb] and he could	33
7	[verb] and he could	33
8	[v-ing] and [pron] could	32
9	[vb past] and [pron] could	30
10	[verb] and she could	29
11	[verb] and she could	29
12	[vb infin] and [pron] could	25
13	[to-vb] and [pron] could	22
14	[verb] and you could	22
15	[verb] and you could	22
16	[verb] and we could	18
17	[verb] and we could	18
18	[verb] and they could	14
19	[verb] and they could	14
20	[verb] and it could	14
21	[verb] and it could	14
22	[vb base] and [pron] could	13
23	go and [pron] could	8
24	[verb] and [Wh det] could	7
25	do and [pron] could	6
26	[verb] and who could	6
27	[verb] and who could	6
28	[verb] and there could	6
29	[verb] and there could	6
30	[verb] and [ex0] could	6