| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could n't [verb] | 12359 |
|
| 2 | [modal v] n't afford | 1043 |
|
| 3 | could [adv] afford | 715 |
|
| 4 | could not afford | 601 |
|
| 5 | could [not/n't] afford | 601 |
|
