| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [adv] [noun] | 21 |
|
| 2 | [modal v] be both [noun] | 21 |
|
| 3 | could be [adv] [noun] | 18 |
|
| 4 | could be both [noun] | 6 |
|
| 5 | could [be] both [noun] | 6 |
|
