SN4 ""

No	Pattern	Freq
1	[vb mod] [adv] have been [prep] [adj]	53
2	[modal v] [adv] have been [prep] [det]	33
3	[modal v] not have been [prep] [adj]	30
4	[modal v] [not/n't] have been [prep] [adj]	30
5	[modal v] [adv] have been [prep] [adj]	23
6	[modal v] [adv] have been in [adj]	19
7	[modal v] not have been [prep] [adj]	18
8	may [adv] have been [prep] [adj]	18
9	may [adv] have been [prep] [adj]	18
10	would [adv] have been [prep] [adj]	17
11	would [adv] have been [prep] [adj]	16
12	[modal v] [adv] have been [prep] [adj]	16
13	[modal v] [adv] have been [prep] that	13
14	[modal v] [adv] have been [prep] that	13
15	[modal v] n't have been [prep] [adj]	12
16	[modal v] [adv] have been of [adj]	8
17	[modal v] [adv] have been on [adj]	7
18	[modal v] never have been [prep] [adj]	6
19	[modal v] [adv] have been at [adj]	6
20	[modal v] never have been [prep] [adj]	6
21	[modal v] [adv] have been [prep] this	6
22	[modal v] [adv] have been [prep] this	6
23	[modal v] well have been [prep] [adj]	5
24	could [adv] have been [prep] [adj]	5
25	[modal v] well have been [prep] [adj]	5
26	should [adv] have been [prep] [adj]	5
27	should [adv] have been [prep] [adj]	5
28	could [adv] have been [prep] [adj]	5