| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could only [noun] at | 5 |
|
| 2 | could only [noun] [prep] | 5 |
|
| 3 | [modal v] only [noun] at | 5 |
|
| 4 | could only [noun] [prep] | 5 |
|
| 5 | could [adv] [noun] at | 5 |
|
