SN4 ""

No	Pattern	Freq
1	had [adv] known	290
2	had [not/n't] known	235
3	had not known	235
4	had n't known	130
5	had not known	105
6	had never known	90
7	had never known	90
8	had ever known	67
9	had ever known	67
10	had always known	56
11	had always known	56
12	had only known	10
13	had only known	10
14	had once known	9
15	had once known	9
16	had long known	6
17	had long known	6
18	had also known	6
19	had also known	6
20	had scarcely known	5
21	had scarcely known	5