| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [be] [vb pp] [subord] [adj] | 119 |
|
| 2 | could only [be] [vb pp] [subord] | 61 |
|
| 3 | only [be] [vb pp] [subord] [adj] | 56 |
|
| 4 | could only [be] [vb pp] [adj] | 8 |
|
