SN4 ""

No	Pattern	Freq
1	[vb mod] have [been] [verb] for	290
2	[modal v] have been [verb] for	290
3	[modal v] have [been] [verb] for	286
4	[modal v] have [been] [vb pp] for	235
5	would have [been] [verb] for	73
6	would have [been] [verb] for	70
7	could have [been] [verb] for	69
8	could have [been] [verb] for	69
9	[modal v] have [been] [v-ing] for	55
10	might have [been] [verb] for	37
11	might have [been] [verb] for	37
12	must have [been] [verb] for	36
13	must have [been] [verb] for	36
14	may have [been] [verb] for	30
15	may have [been] [verb] for	30
16	should have [been] [verb] for	26
17	should have [been] [verb] for	26
18	[modal v] have [been] forgiven for	25
19	[modal v] have [been] forgive for	25
20	will have [been] [verb] for	17
21	will have [been] [verb] for	16
22	[modal v] have [been] use for	15
23	[modal v] have [been] used for	15
24	[modal v] have [been] looking for	13
25	[modal v] have [been] look for	13
26	[modal v] have [been] make for	12
27	[modal v] have [been] made for	11
28	[modal v] have [been] taken for	10
29	[modal v] have [been] take for	10
30	[modal v] have [been] do for	8