SN4 ""

No	Pattern	Freq
1	had [vb pp] before	220
2	has [vb pp] before	59
3	have [vb pp] before	48
4	have [vb pp] before	42
5	have gone before	35
6	have done before	31
7	have appeared before	30
8	've [vb pp] before	27
9	have happened before	24
10	have said before	17
11	have come before	17
12	to have [vb pp] before	15
13	have seen before	13
14	have died before	11
15	have put before	10
16	'd [vb pp] before	10
17	have had before	8
18	have existed before	7
19	's [vb pp] before	6
20	have arrived before	6
21	have left before	6
22	have heard before	5
23	have felt before	5
24	have known before	5