| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [verb] him at | 8 |
|
| 2 | could [not/n't] [verb] him at | 7 |
|
| 3 | could not [verb] him at | 7 |
|
| 4 | could n't [verb] him at | 6 |
|
| 5 | could [verb] him [verb] at | 8 |
|
| 6 | could [verb] him [v-ing] at | 5 |
|
