SN4 ""

No	Pattern	Freq
1	[pron] could have [vb pp] with	83
2	[pers pn] could have [vb pp] with	79
3	i could have [vb pp] with	32
4	i could have [vb pp] with	32
5	[noun] could have [vb pp] with	32
6	[noun sg] could have [vb pp] with	17
7	[noun prp] could have [vb pp] with	14
8	she could have [vb pp] with	12
9	she could have [vb pp] with	12
10	we could have [vb pp] with	11
11	we could have [vb pp] with	11
12	he could have [vb pp] with	10
13	he could have [vb pp] with	10
14	you could have [vb pp] with	7
15	you could have [vb pp] with	7
16	they could have [vb pp] with	6
17	they could have [vb pp] with	6
18	could [adv] have [vb pp] with	30
19	could not have [vb pp] with	22
20	could [not/n't] have [vb pp] with	22
21	could n't have [vb pp] with	15
22	could [adv] have [vb pp] with	8
23	could not have [vb pp] with	7
24	could have [be] [vb pp] with	30
25	could have be [vb pp] with	30
26	could have been [vb pp] with	30
27	could have [been] [vb pp] with	30
28	could have [vb pp] [adv] with	35
29	could have [vb pp] [adv] with	20
30	could have [vb pp] [adv prt] with	15