| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] what [pron] could [vb infin] | 126 |
|
| 2 | what [pron] could not [vb infin] | 64 |
|
| 3 | [prep] [pron] could not [vb infin] | 52 |
|
| 4 | [prep] what [pron] could not | 9 |
|
