| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i do n't know | 13480 |
|
| 2 | i do [not/n't] know | 12356 |
|
| 3 | i did [not/n't] know | 1747 |
|
| 4 | i do not know | 648 |
|
| 5 | i do [not/n't] know | 38 |
|
| 6 | i do nt know | 13 |
|
