| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] [prep] [adj] | 1718 |
|
| 2 | only [verb] [prep] [adj] | 938 |
|
| 3 | could only [verb] [prep] | 261 |
|
| 4 | could only [verb] [adj] | 154 |
|
