SN4 ""

No	Pattern	Freq
1	[modal v] not have been [noun]	39
2	[vb mod] not have been [noun]	39
3	would not have been [noun]	12
4	would not have been [noun]	12
5	may not have been [noun]	9
6	may not have been [noun]	9
7	could not have been [noun]	8
8	could not have been [noun]	8
9	might not have been [noun]	5
10	might not have been [noun]	5
11	not [pron] have been [noun]	6
12	not have been [art] [noun]	102
13	not have been [art] [noun]	102
14	not have been a [noun]	66
15	not have been a [noun]	57
16	not have been [adj] [noun]	42
17	not have been the [noun]	36
18	not have been the [noun]	36
19	not have been [det] [noun]	32
20	not have been [prep] [noun]	20
21	not have been [prep] [noun]	20
22	not have been any [noun]	16
23	not have been any [noun]	16
24	not have been [pron] [noun]	12
25	not have been [verb] [noun]	12
26	not have been [pos pn] [noun]	11
27	not have been [adj] [noun]	10
28	not have been in [noun]	9
29	not have been an [noun]	9
30	not have been in [noun]	9