SN4 ""

No	Pattern	Freq
1	had [adv] [vb pp] before	350
2	had [adv] [vb pp] before	247
3	had never [vb pp] before	166
4	had never [vb pp] before	166
5	had not [vb pp] before	103
6	had [not/n't] [vb pp] before	103
7	had [adv] seen before	87
8	had ever [vb pp] before	66
9	had ever [vb pp] before	66
10	had not [vb pp] before	56
11	had n't [vb pp] before	47
12	had [adv] done before	31
13	had [adv] known before	20
14	had [adv] experienced before	19
15	had [adv] noticed before	19
16	had [adv] heard before	18
17	had [adv] met before	16
18	had [adv] felt before	14
19	had [adv] had before	10
20	had [adv] happened before	8
21	had [adv] encountered before	5
22	had [adv] used before	5
23	had [adv] run before	5