SN4 ""

No	Pattern	Freq
1	[vb mod] [adv] have been [verb] for	58
2	[modal v] [adv] have been [verb] for	58
3	could [adv] have been [verb] for	15
4	could [adv] have been [verb] for	15
5	might [adv] have been [verb] for	12
6	might [adv] have been [verb] for	12
7	would [adv] have been [verb] for	11
8	would [adv] have been [verb] for	10
9	may [adv] have been [verb] for	9
10	may [adv] have been [verb] for	9
11	should [adv] have been [verb] for	5
12	should [adv] have been [verb] for	5
13	[adv] have been [verb] [adv] for	9
14	[adv] have been [verb] [conj] for	7
15	[adv] have been [verb] [adv] for	6
16	[adv] have been [verb] [subord] for	6
17	[adv] have been [verb] but for	6
18	[adv] have been [verb] but for	5
19	[adv] have been [verb] for [noun]	15
20	[adv] have been [verb] for [adj]	15
21	[adv] have been [verb] for [art]	12
22	[adv] have been [verb] for [art]	12
23	[adv] have been [verb] for [noun sg]	10
24	[adv] have been [verb] for [det]	10
25	[adv] have been [verb] for the	9
26	[adv] have been [verb] for the	9
27	[adv] have been [verb] for [verb]	8
28	[adv] have been [verb] for [pron]	7
29	[adv] have been [verb] for [v-ing]	6