| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [be] a [noun] | 614 |
|
| 2 | only [be] a [noun] | 163 |
|
| 3 | could only [be] a | 32 |
|
| 4 | could only [be] [noun] | 26 |
|
