SN4 ""

No	Pattern	Freq
1	[verb] [adv prt] and [pron] could	52
2	[vb past] [adv prt] and [pron] could	16
3	[vb pp] [adv prt] and [pron] could	13
4	[pron] [adv prt] and [pron] could	12
5	[noun] [adv prt] and [pron] could	11
6	be [adv prt] and [pron] could	10
7	[be] [adv prt] and [pron] could	10
8	[pers pn] [adv prt] and [pron] could	10
9	[v-ing] [adv prt] and [pron] could	9
10	come [adv prt] and [pron] could	8
11	[vb infin] [adv prt] and [pron] could	8
12	[was/were] [adv prt] and [pron] could	8
13	[noun sg] [adv prt] and [pron] could	7
14	was [adv prt] and [pron] could	7
15	go [adv prt] and [pron] could	5
16	[adv prt] [adv] and [pron] could	14
17	[adv prt] [adv] and [pron] could	13
18	[adv prt] and [adv] [pron] could	9
19	[adv prt] and [adv] [pron] could	5
20	[adv prt] and [verb] [pron] could	5
21	[adv prt] and [pron] could [verb]	48
22	[adv prt] and [pron] could [vb infin]	48
23	[adv prt] and [pron] could [adv]	35
24	[adv prt] and [pron] could [not/n't]	27
25	[adv prt] and [pron] could not	27
26	[adv prt] and [pron] could n't	23
27	[adv prt] and [pron] could see	13
28	[adv prt] and [pron] could see	13
29	[adv prt] and [pron] could [adv]	8
30	[adv prt] and [pron] could [be]	6