SN4 ""

No	Pattern	Freq
1	[modal v] have been [noun sg]	289
2	[vb mod] have been [noun sg]	289
3	would have been [noun sg]	104
4	would have been [noun sg]	98
5	[adv] have been [noun sg]	66
6	[adv] have been [noun sg]	47
7	must have been [noun sg]	46
8	must have been [noun sg]	46
9	might have been [noun sg]	45
10	might have been [noun sg]	45
11	may have been [noun sg]	41
12	may have been [noun sg]	41
13	could have been [noun sg]	34
14	could have been [noun sg]	34
15	[not/n't] have been [noun sg]	19
16	not have been [noun sg]	19
17	should have been [noun sg]	14
18	should have been [noun sg]	14
19	not have been [noun sg]	13
20	well have been [noun sg]	7
21	easily have been [noun sg]	7
22	easily have been [noun sg]	7
23	well have been [noun sg]	7
24	n't have been [noun sg]	6
25	'd have been [noun sg]	6
26	will have been [noun sg]	5
27	have been [art] [noun sg]	1788
28	have been [art] [noun sg]	1788
29	have been a [noun sg]	1100
30	have been a [noun sg]	955