SN4 ""

No	Pattern	Freq
1	[modal v] have been [verb] in the	157
2	[vb mod] have been [verb] in the	157
3	[adv] have been [verb] in the	36
4	should have been [verb] in the	34
5	should have been [verb] in the	34
6	would have been [verb] in the	31
7	would have been [verb] in the	31
8	may have been [verb] in the	26
9	may have been [verb] in the	26
10	must have been [verb] in the	22
11	must have been [verb] in the	22
12	[adv] have been [verb] in the	22
13	could have been [verb] in the	21
14	could have been [verb] in the	21
15	[not/n't] have been [verb] in the	14
16	not have been [verb] in the	14
17	might have been [verb] in the	12
18	might have been [verb] in the	12
19	will have been [verb] in the	11
20	not have been [verb] in the	11
21	will have been [verb] in the	11
22	never have been [verb] in the	7
23	never have been [verb] in the	7
24	have been [adv] [verb] in the	5
25	have been [adv] [verb] in the	5
26	have been [verb] [adv] in the	35
27	have been [verb] [adv prt] in the	18
28	have been [verb] [adv] in the	17
29	have been [verb] [prep] in the	9
30	have been [verb] [prep] in the	9