SN4 ""

No	Pattern	Freq
1	[modal v] [adv] have been	4599
2	[vb mod] [adv] have been	4599
3	would [adv] have been	1457
4	would [adv] have been	1433
5	could [adv] have been	981
6	could [adv] have been	981
7	may [adv] have been	768
8	may [adv] have been	768
9	[adv] [adv] have been	602
10	[noun] [adv] have been	563
11	might [adv] have been	475
12	might [adv] have been	475
13	[verb] [adv] have been	459
14	[pron] [adv] have been	454
15	[adv] [adv] have been	435
16	should [adv] have been	325
17	should [adv] have been	325
18	[conj] [adv] have been	322
19	[pers pn] [adv] have been	283
20	[noun sg] [adv] have been	275
21	[noun pl] [adv] have been	233
22	can [adv] have been	219
23	[coord] [adv] have been	196
24	[prep] [adv] have been	181
25	[prep] [adv] have been	181
26	must [adv] have been	176
27	must [adv] have been	176
28	can [adv] have been	162
29	[not/n't] [adv] have been	153
30	[adj] [adv] have been	153