| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not [vb infin] a | 847 |
|
| 2 | could [vb infin] a [adj -er] | 111 |
|
| 3 | not [vb infin] a [adj -er] | 108 |
|
| 4 | could not [vb infin] [adj -er] | 10 |
|
