| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] not know the answer to | 20 |
|
| 2 | do not know the answer to | 20 |
|
| 3 | [vb base] not know the answer to | 14 |
|
| 4 | do not know the answer to | 14 |
|
| 5 | not know the answer to [det] | 15 |
|
| 6 | not know the answer to [adj] | 15 |
|
| 7 | not know the answer to that | 9 |
|
| 8 | not know the answer to that | 9 |
|
