| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could only [be] [vb pp] | 506 |
|
| 2 | could [be] [vb pp] [adj] | 239 |
|
| 3 | could only [be] [adj] | 40 |
|
| 4 | only [be] [vb pp] [adj] | 23 |
|
