SN4 ""

No	Pattern	Freq
1	[pron] could have [verb] that	77
2	[pers pn] could have [verb] that	65
3	i could have [verb] that	24
4	i could have [verb] that	24
5	you could have [verb] that	12
6	you could have [verb] that	12
7	[noun] could have [verb] that	10
8	we could have [verb] that	9
9	we could have [verb] that	9
10	he could have [verb] that	8
11	he could have [verb] that	8
12	[indef pn] could have [verb] that	7
13	they could have [verb] that	6
14	who could have [verb] that	5
15	[Wh pn] could have [verb] that	5
16	who could have [verb] that	5
17	could [adv] have [verb] that	19
18	could not have [verb] that	15
19	could [not/n't] have [verb] that	15
20	could [pron] have [verb] that	11
21	could [pers pn] have [verb] that	11
22	could n't have [verb] that	9
23	could not have [verb] that	6
24	could have [verb] [prep] that	27
25	could have [verb] [prep] that	27
26	could have [verb] with that	11
27	could have [verb] with that	11
28	could have [verb] [pron] that	9
29	could have [verb] [pers pn] that	8
30	could have [verb] that [noun]	28