SN4 ""

No	Pattern	Freq
1	[pron] [vb mod] not have been	569
2	[pers pn] [modal v] not have been	445
3	[pron] would not have been	210
4	[pron] would not have been	209
5	it [modal v] not have been	188
6	it [modal v] not have been	188
7	[pron] could not have been	121
8	[pron] could not have been	121
9	he [modal v] not have been	80
10	he [modal v] not have been	80
11	[pron] may not have been	71
12	[pron] may not have been	71
13	they [modal v] not have been	66
14	which [modal v] not have been	66
15	[Wh det] [modal v] not have been	66
16	which [modal v] not have been	66
17	[pron] might not have been	61
18	[pron] might not have been	61
19	they [modal v] not have been	59
20	[pron] should not have been	48
21	[pron] should not have been	48
22	she [modal v] not have been	42
23	she [modal v] not have been	42
24	[pron] can not have been	42
25	[pron] can not have been	42
26	i [modal v] not have been	40
27	i [modal v] not have been	40
28	[ex0] [modal v] not have been	33
29	there [modal v] not have been	33
30	there [modal v] not have been	33