SN4 ""

No	Pattern	Freq
1	[vb mod] have been the [adj] [noun]	124
2	[modal v] have been the [adj] [noun]	124
3	[adv] have been the [adj] [noun]	37
4	may have been the [adj] [noun]	35
5	may have been the [adj] [noun]	35
6	would have been the [adj] [noun]	28
7	would have been the [adj] [noun]	28
8	[adv] have been the [adj] [noun]	22
9	must have been the [adj] [noun]	18
10	must have been the [adj] [noun]	18
11	might have been the [adj] [noun]	16
12	might have been the [adj] [noun]	16
13	not have been the [adj] [noun]	15
14	[not/n't] have been the [adj] [noun]	15
15	not have been the [adj] [noun]	15
16	could have been the [adj] [noun]	13
17	could have been the [adj] [noun]	13
18	well have been the [adj] [noun]	9
19	should have been the [adj] [noun]	9
20	well have been the [adj] [noun]	9
21	should have been the [adj] [noun]	9
22	will have been the [adj] [noun]	5
23	will have been the [adj] [noun]	5
24	have been [prep] the [adj] [noun]	37
25	have been [prep] the [adj] [noun]	37
26	have been [verb] the [adj] [noun]	22
27	have been [v-ing] the [adj] [noun]	11
28	have been on the [adj] [noun]	10
29	have been on the [adj] [noun]	10
30	have been in the [adj] [noun]	8