| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [adv] [vb infin] [be] [subord] | 27 |
|
| 2 | [vb mod] [adv] [vb infin] [be] [subord] | 27 |
|
| 3 | could [adv] [vb infin] [be] [conj] | 15 |
|
| 4 | could [adv] [vb infin] [be] [subord] | 8 |
|
| 5 | could [adv] [verb] [be] [subord] | 8 |
|
