SN4 ""

No	Pattern	Freq
1	might have been [verb]	901
2	might have [been] [verb]	901
3	might have [been] [vb pp]	755
4	might have [been] [v-ing]	132
5	might have [been] expect	119
6	might have [been] expected	119
7	might have [been] use	25
8	might have [been] used	23
9	might have [been] think	21
10	might have [been] thought	19
11	might have [been] make	18
12	might have [been] made	16
13	might have [been] take	16
14	might have [been] write	13
15	might have [been] written	12
16	might have [been] avoid	12
17	might have [been] avoided	12
18	might have [been] taken	12
19	might have [been] saved	11
20	might have [been] save	11
21	might have [been] have	10
22	might have [been] do	10
23	might have [been] say	10
24	might have [been] forgive	10
25	might have [been] forgiven	10
26	might have [been] cause	9
27	might have [been] see	9
28	might have [been] caused	9
29	might have [been] tempted	8
30	might have [been] anticipated	8