| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [vb infin] [noun] | 809 |
|
| 2 | could [adv] [vb infin] [be] | 501 |
|
| 3 | could [vb infin] [be] [noun] | 217 |
|
| 4 | [adv] [vb infin] [be] [noun] | 128 |
|
| 5 | could [adv] [be] [noun] | 105 |
|
