SN4 ""

No	Pattern	Freq
1	[modal v] have been [vb pp] for	233
2	[vb mod] have been [vb pp] for	233
3	could have been [vb pp] for	58
4	could have been [vb pp] for	58
5	would have been [vb pp] for	57
6	would have been [vb pp] for	56
7	[adv] have been [vb pp] for	49
8	[adv] have been [vb pp] for	38
9	might have been [vb pp] for	34
10	might have been [vb pp] for	34
11	may have been [vb pp] for	27
12	may have been [vb pp] for	27
13	should have been [vb pp] for	23
14	should have been [vb pp] for	23
15	must have been [vb pp] for	18
16	must have been [vb pp] for	18
17	will have been [vb pp] for	16
18	will have been [vb pp] for	15
19	not have been [vb pp] for	11
20	[not/n't] have been [vb pp] for	11
21	not have been [vb pp] for	10
22	also have been [vb pp] for	5
23	also have been [vb pp] for	5
24	have [adv] been [vb pp] for	5
25	have [adv] been [vb pp] for	5
26	have been [adv] [vb pp] for	9
27	have been [adv] [vb pp] for	9
28	have been [vb pp] [adv] for	25
29	have been [vb pp] [adv] for	15
30	have been [vb pp] [conj] for	13