| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could only [verb] [prep] a | 25 |
|
| 2 | could only [verb] [prep] a | 25 |
|
| 3 | could only [vb infin] [prep] a | 24 |
|
| 4 | could only [verb] as a | 5 |
|
| 5 | could only [verb] as a | 5 |
|
