SN4 ""

No	Pattern	Freq
1	had [adv] seen	916
2	had [not/n't] seen	526
3	had not seen	525
4	had never seen	431
5	had never seen	431
6	had n't seen	298
7	had ever seen	268
8	had ever seen	268
9	had not seen	227
10	had already seen	31
11	had already seen	31
12	had just seen	22
13	had just seen	22
14	had only seen	20
15	had only seen	20
16	had once seen	16
17	had once seen	16
18	had always seen	12
19	had always seen	12
20	had actually seen	11
21	had actually seen	11
22	had also seen	10
23	had also seen	10
24	had yet seen	9
25	had yet seen	9
26	had often seen	7
27	had rarely seen	7
28	had rarely seen	7
29	had often seen	7
30	had previously seen	6