| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [vb infin] [adv] [coord] | 3343 |
|
| 2 | [modal v] [vb infin] [adv] [coord] | 3343 |
|
| 3 | could [vb infin] [adv] [conj] | 674 |
|
| 4 | could [vb infin] [adv] [coord] | 400 |
|
| 5 | could [verb] [adv] [coord] | 400 |
|
