| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [vb infin] [pron] | 5480 |
|
| 2 | [not/n't] [vb infin] [pron] at | 565 |
|
| 3 | could [not/n't] [vb infin] at | 138 |
|
| 4 | could [vb infin] [pron] at | 74 |
|
| 5 | could [not/n't] [pron] at | 5 |
|
