| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] i do n't know | 25 |
|
| 2 | [is] i [vb base] n't know | 25 |
|
| 3 | is i [vb base] n't know | 18 |
|
| 4 | 's i [vb base] n't know | 7 |
|
