SN4 ""

No	Pattern	Freq
1	[modal v] [adv] have been [prep] [det]	33
2	[vb mod] [adv] have been [prep] [det]	33
3	[modal v] [adv] have been [prep] [det]	33
4	[modal v] [not/n't] have been [prep] [det]	19
5	[modal v] not have been [prep] [det]	19
6	[modal v] [adv] have been [prep] [det]	14
7	would [adv] have been [prep] [det]	13
8	[modal v] [adv] have been [prep] that	13
9	would [adv] have been [prep] [det]	12
10	may [adv] have been [prep] [det]	11
11	may [adv] have been [prep] [det]	11
12	[modal v] [adv] have been in [det]	11
13	[modal v] n't have been [prep] [det]	11
14	[modal v] [adv] have been in [det]	11
15	[modal v] not have been [prep] [det]	8
16	[modal v] [adv] have been on [det]	6
17	[modal v] [adv] have been at [det]	6
18	[modal v] [adv] have been [prep] this	6
19	[modal v] [adv] have been at [det]	6
20	[modal v] [adv] have been on [det]	6
21	should [adv] have been [prep] [det]	5
22	[modal v] never have been [prep] [det]	5
23	[modal v] never have been [prep] [det]	5
24	should [adv] have been [prep] [det]	5