| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could only be [noun] | 26 |
|
| 2 | could only [be] [noun] | 26 |
|
| 3 | could only [be] [noun sg] | 10 |
|
| 4 | could only [be] [noun prp] | 10 |
|
| 5 | could only [be] [noun pl] | 5 |
|
