| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [pron] [pron] could not | 82 |
|
| 2 | [prep] what [pron] could [adv] | 27 |
|
| 3 | [prep] what [pron] [modal v] not | 25 |
|
| 4 | [prep] what [pron] [vb mod] not | 25 |
|
| 5 | [prep] what [pron] could not | 9 |
|
| 6 | [prep] what [pron] could [not/n't] | 9 |
|
| 7 | [prep] what [pron] could not | 7 |
|
| 8 | [prep] what [pron] could not | 7 |
|
