SN4 ""

No	Pattern	Freq
1	[modal v] have been the [adj]	317
2	[vb mod] have [been] the [adj]	317
3	[modal v] have [been] the [adj]	314
4	[modal v] have [been] the [adj]	152
5	would have [been] the [adj]	108
6	would have [been] the [adj]	106
7	[modal v] have [been] the [num ord]	76
8	must have [been] the [adj]	62
9	must have [been] the [adj]	62
10	may have [been] the [adj]	61
11	may have [been] the [adj]	61
12	[modal v] have [been] the [adj -est]	47
13	[modal v] have [been] the first	41
14	[modal v] have [been] the first	41
15	[modal v] have [been] the [det]	30
16	[modal v] have [been] the same	30
17	[modal v] have [been] the same	30
18	should have [been] the [adj]	26
19	could have [been] the [adj]	26
20	should have [been] the [adj]	26
21	could have [been] the [adj]	26
22	might have [been] the [adj]	25
23	might have [been] the [adj]	25
24	[modal v] have [been] the only	22
25	[modal v] have [been] the only	22
26	[modal v] have [been] the last	21
27	[modal v] have [been] the last	21
28	[modal v] have [been] the good	17
29	[modal v] have [been] the best	12
30	will have [been] the [adj]	9