SN4 ""

No	Pattern	Freq
1	[modal v] [adv] have been	4565
2	[vb mod] [adv] have been	4565
3	would [adv] have been	1455
4	would [adv] have been	1431
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	might [adv] have been	474
10	might [adv] have been	474
11	[adv] [adv] have been	335
12	should [adv] have been	321
13	should [adv] have been	321
14	can [adv] have been	219
15	[adv] [adv] have been	192
16	must [adv] have been	176
17	must [adv] have been	176
18	can [adv] have been	162
19	not [adv] have been	143
20	[not/n't] [adv] have been	143
21	will [adv] have been	129
22	will [adv] have been	117
23	not [adv] have been	108
24	as [adv] have been	57
25	ca [adv] have been	57
26	as [adv] have been	57
27	[subord] [adv] have been	57
28	[conj] [adv] have been	57
29	need [adv] have been	38
30	need [adv] have been	38