SN4 ""

No	Pattern	Freq
1	[vb mod] have seen	729
2	[modal v] have seen	702
3	would have seen	146
4	must have seen	142
5	must have seen	142
6	would have seen	122
7	should have seen	122
8	should have seen	122
9	may have seen	114
10	may have seen	114
11	will have seen	85
12	will have seen	69
13	might have seen	56
14	might have seen	56
15	could have seen	53
16	could have seen	53
17	'd have seen	24
18	[modal v] 've seen	17
19	'll have seen	16
20	ought have seen	10
21	[modal v] to have seen	10
22	ought have seen	10