| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] or could [adv] | 16 |
|
| 2 | [vb mod] or could [adv] | 16 |
|
| 3 | [modal v] or could [not/n't] | 15 |
|
| 4 | [modal v] or could not | 15 |
|
| 5 | [modal v] or could not | 14 |
|
| 6 | could or could [adv] | 13 |
|
| 7 | could or could [adv] | 13 |
|
