SN4 ""

No	Pattern	Freq
1	[modal v] [pers pn] have been [prep]	13
2	[vb mod] [pers pn] have been [prep]	13
3	would [pers pn] have been [prep]	5
4	would [pers pn] have been [prep]	5
5	[pers pn] [vb mod] have been [prep]	582
6	[pers pn] [modal v] have been [prep]	582
7	[pers pn] would have been [prep]	203
8	[pers pn] would have been [prep]	168
9	[pers pn] must have been [prep]	152
10	[pers pn] must have been [prep]	152
11	[pers pn] should have been [prep]	71
12	[pers pn] should have been [prep]	71
13	[pers pn] might have been [prep]	60
14	[pers pn] might have been [prep]	60
15	[pers pn] may have been [prep]	43
16	[pers pn] may have been [prep]	43
17	[pers pn] could have been [prep]	41
18	[pers pn] could have been [prep]	41
19	[pers pn] 'd have been [prep]	35
20	[pers pn] will have been [prep]	11
21	[pers pn] will have been [prep]	8
22	[pers pn] have been [verb] [prep]	25
23	[pers pn] have been [vb pp] [prep]	17
24	[pers pn] have been [adj] [prep]	15
25	[pers pn] have been [adj] [prep]	9
26	[pers pn] have been [v-ing] [prep]	7
27	[pers pn] have been [prep] [adj]	5