SN4 ""

No	Pattern	Freq
1	[vb mod] have been [noun pl]	155
2	[modal v] have been [noun pl]	155
3	[adv] have been [noun pl]	45
4	may have been [noun pl]	42
5	may have been [noun pl]	42
6	[adv] have been [noun pl]	37
7	would have been [noun pl]	35
8	would have been [noun pl]	33
9	must have been [noun pl]	27
10	must have been [noun pl]	27
11	might have been [noun pl]	21
12	might have been [noun pl]	21
13	could have been [noun pl]	20
14	could have been [noun pl]	20
15	should have been [noun pl]	8
16	well have been [noun pl]	8
17	not have been [noun pl]	8
18	should have been [noun pl]	8
19	well have been [noun pl]	8
20	not have been [noun pl]	8
21	[not/n't] have been [noun pl]	8
22	have been [adj] [noun pl]	208
23	have been [adj] [noun pl]	108
24	have been [verb] [noun pl]	72
25	have been [num] [noun pl]	63
26	have been [art] [noun pl]	55
27	have been [art] [noun pl]	55
28	have been [v-ing] [noun pl]	39
29	have been the [noun pl]	37
30	have been the [noun pl]	37