SN4 ""

No	Pattern	Freq
1	[vb mod] have been [adj] to	227
2	[modal v] have been [adj] to	226
3	would have been [adj] to	110
4	would have been [adj] to	109
5	may have been [adj] to	44
6	may have been [adj] to	44
7	[modal v] have been due to	37
8	must have been [adj] to	28
9	must have been [adj] to	28
10	should have been [adj] to	19
11	should have been [adj] to	19
12	might have been [adj] to	16
13	might have been [adj] to	16
14	[modal v] have been obvious to	13
15	[modal v] have been entitled to	12
16	[modal v] have been available to	9
17	[modal v] have been close to	7
18	[modal v] have been open to	7
19	[modal v] have been tantamount to	7
20	[modal v] have been able to	6
21	[modal v] have been clear to	6
22	[modal v] have been subject to	6
23	could have been [adj] to	5
24	could have been [adj] to	5