SN4 ""

No	Pattern	Freq
1	[vb mod] have been [adj] for	271
2	[modal v] have been [adj] for	271
3	would have been [adj] for	144
4	would have been [adj] for	142
5	[adv] have been [adj] for	63
6	must have been [adj] for	48
7	must have been [adj] for	48
8	not have been [adj] for	42
9	[not/n't] have been [adj] for	42
10	not have been [adj] for	33
11	may have been [adj] for	29
12	may have been [adj] for	29
13	might have been [adj] for	24
14	might have been [adj] for	24
15	[adv] have been [adj] for	21
16	could have been [adj] for	15
17	could have been [adj] for	15
18	n't have been [adj] for	9
19	should have been [adj] for	8
20	should have been [adj] for	8
21	have been [adv] [adj] for	105
22	have been [adv] [adj] for	105
23	have been very [adj] for	20
24	have been very [adj] for	20
25	have been too [adj] for	15
26	have been too [adj] for	15
27	have been more [adj] for	12
28	have been more [adj] for	12
29	have been [verb] [adj] for	8
30	have been [vb pp] [adj] for	6