| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not know why i [was/were] | 5 |
|
| 2 | n't know why i [was/were] | 5 |
|
| 3 | [not/n't] know why i [was/were] | 5 |
|
| 4 | [adv] know why i [was/were] | 5 |
|
