| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | and could [adv] | 1120 |
|
| 2 | and [modal v] n't | 837 |
|
| 3 | and could [not/n't] | 687 |
|
| 4 | and could not | 687 |
|
| 5 | [conj] could n't | 544 |
|
