SN4 ""

No	Pattern	Freq
1	[conj] i could have	206
2	[verb] i could have	133
3	[subord] i could have	115
4	[adv] i could have	81
5	if i could have	67
6	if i could have	67
7	[adv] i could have	66
8	[noun] i could have	57
9	[coord] i could have	54
10	[vb base] i could have	49
11	think i could have	43
12	[noun sg] i could have	40
13	that i could have	37
14	[that] i could have	37
15	that i could have	37
16	[vb infin] i could have	35
17	[vb past] i could have	33
18	and i could have	32
19	and i could have	32
20	think i could have	28
21	[pron] i could have	27
22	wish i could have	23
23	[adj] i could have	20
24	say i could have	18
25	wish i could have	17
26	but i could have	17
27	but i could have	17
28	said i could have	16
29	than i could have	14
30	than i could have	14