| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [noun prp] | 27 |
|
| 2 | could [not/n't] [noun prp] | 23 |
|
| 3 | could not [noun prp] | 23 |
|
| 4 | could n't [noun prp] | 20 |
|
