SN4 ""

No	Pattern	Freq
1	[vb mod] [adv] have been [verb] for	58
2	[vb mod] [adv] have been [verb] for	58
3	[vb mod] [adv] have been [vb pp] for	46
4	[vb mod] [adv] have been [verb] for	43
5	[vb mod] not have been [verb] for	15
6	[vb mod] [not/n't] have been [verb] for	15
7	could [adv] have been [verb] for	15
8	might [adv] have been [verb] for	12
9	[vb mod] not have been [verb] for	11
10	[vb mod] [adv] have been [v-ing] for	11
11	would [adv] have been [verb] for	10
12	may [adv] have been [verb] for	9
13	[vb mod] [adv] have been used for	6
14	[vb mod] [adv] have been use for	6
15	should [adv] have been [verb] for	5
16	[vb mod] well have been [verb] for	5
17	[vb mod] well have been [verb] for	5
18	[vb mod] also have been [verb] for	5
19	[vb mod] also have been [verb] for	5