| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [verb] [adv] [adv] [subord] | 541 |
|
| 2 | could [verb] [adv] [adv] [conj] | 107 |
|
| 3 | could [verb] [adv] [adv] [subord] | 96 |
|
| 4 | could [verb] [adv] [adv] [subord] | 77 |
|
