SN4 ""

No	Pattern	Freq
1	[modal v] [adv] have been	2481
2	[vb mod] [adv] have been	2481
3	would [adv] have been	689
4	would [adv] have been	666
5	[adv] [adv] have been	544
6	[noun] [adv] have been	526
7	may [adv] have been	520
8	may [adv] have been	520
9	could [adv] have been	471
10	could [adv] have been	471
11	[pron] [adv] have been	428
12	[adv] [adv] have been	380
13	might [adv] have been	334
14	might [adv] have been	334
15	[verb] [adv] have been	324
16	[conj] [adv] have been	306
17	[pers pn] [adv] have been	259
18	[noun sg] [adv] have been	247
19	[noun pl] [adv] have been	228
20	[coord] [adv] have been	187
21	[prep] [adv] have been	161
22	[prep] [adv] have been	161
23	must [adv] have been	153
24	must [adv] have been	153
25	not [adv] have been	151
26	[not/n't] [adv] have been	151
27	so [adv] have been	148
28	so [adv] have been	148
29	should [adv] have been	139
30	should [adv] have been	139