| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could n't [vb infin] at | 78 |
|
| 2 | could not [vb infin] at | 60 |
|
| 3 | could [not/n't] look at | 43 |
|
| 4 | could [not/n't] get at | 10 |
|
| 5 | could [not/n't] sleep at | 8 |
|
| 6 | could [not/n't] stay at | 6 |
|
