| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [verb] at | 138 |
|
| 2 | could [not/n't] [vb infin] at | 138 |
|
| 3 | [modal v] [not/n't] sleep at | 24 |
|
| 4 | [vb mod] [not/n't] sleep at | 24 |
|
| 5 | could [not/n't] sleep [prep] | 21 |
|
| 6 | could [not/n't] sleep [prep] | 21 |
|
| 7 | could [not/n't] sleep at | 8 |
|
| 8 | could [adv] sleep at | 8 |
|
| 9 | could [not/n't] sleep at | 8 |
|
| 10 | could [not/n't] sleep at | 8 |
|
