SN4 ""

No	Pattern	Freq
1	have [adv] [vb pp] before	633
2	have [adv] [vb pp] before	466
3	had [adv] [vb pp] before	350
4	have never [vb pp] before	318
5	have never [vb pp] before	318
6	have not [vb pp] before	167
7	have [not/n't] [vb pp] before	167
8	have [adv] seen before	147
9	have ever [vb pp] before	113
10	have ever [vb pp] before	113
11	have not [vb pp] before	95
12	have [adv] [vb pp] before	82
13	'd [adv] [vb pp] before	80
14	have n't [vb pp] before	72
15	have [adv] done before	67
16	've [adv] [vb pp] before	59
17	has [adv] [vb pp] before	50
18	have [adv] heard before	40
19	have [adv] met before	31
20	have [adv] experienced before	28
21	have [adv] had before	24
22	have [adv] noticed before	24
23	have [adv] known before	23
24	have [adv] happened before	22
25	have [adv] felt before	19
26	's [adv] [vb pp] before	9
27	have [adv] encountered before	9
28	have [adv] used before	8
29	have [adv] run before	6
30	have [adv] existed before	6