SN4 ""

No	Pattern	Freq
1	[vb mod] [adv] have been [det]	112
2	[vb mod] not have been [det]	80
3	[vb mod] [not/n't] have been [det]	80
4	[vb mod] n't have been [det]	44
5	would [adv] have been [det]	38
6	[vb mod] not have been [det]	36
7	[vb mod] [adv] have been [det]	33
8	could [adv] have been [det]	25
9	[vb mod] [adv] have been any	25
10	[vb mod] [adv] have been much	20
11	may [adv] have been [det]	19
12	[vb mod] [adv] have been some	13
13	[vb mod] [adv] have been that	13
14	[vb mod] [adv] have been such	10
15	[vb mod] [adv] have been many	9
16	[vb mod] well have been [det]	8
17	[vb mod] well have been [det]	8
18	must [adv] have been [det]	7
19	ca [adv] have been [det]	6
20	[vb mod] [adv] have been more	6
21	can [adv] have been [det]	6
22	might [adv] have been [det]	6
23	[vb mod] also have been [det]	5
24	should [adv] have been [det]	5
25	[vb mod] also have been [det]	5
26	[vb mod] [adv] have been another	5