| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | do [not/n't] know [pron] | 6758 |
|
| 2 | do [not/n't] [verb] who | 643 |
|
| 3 | do [not/n't] [vb infin] who | 642 |
|
| 4 | do [not/n't] know [Wh pn] | 463 |
|
| 5 | do [adv] know who | 459 |
|
| 6 | do [not/n't] know who | 458 |
|
| 7 | [verb] [not/n't] know who | 458 |
|
| 8 | do [not/n't] know who | 458 |
|
