SN4 ""

No	Pattern	Freq
1	[prep] what could have	32
2	[prep] what could have	32
3	[verb] what could have	15
4	to what could have	7
5	of what could have	7
6	of what could have	7
7	to what could have	7
8	[coord] what could have	6
9	[conj] what could have	6
10	and what could have	5
11	[vb past] what could have	5
12	and what could have	5
13	what [pron] could have	35
14	what [pers pn] could have	33
15	what [noun] could have	11
16	what they could have	7
17	what they could have	7
18	what he could have	6
19	what you could have	6
20	what you could have	6
21	what he could have	6
22	what [noun pl] could have	5
23	what could [pers pn] have	28
24	what could [pron] have	28
25	what could she have	6
26	what could i have	6
27	what could she have	6
28	what could [adv] have	6
29	what could i have	6
30	what could [adv] have	6