| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [adj] [noun sg] he could | 6 |
|
| 2 | at [adj] [noun] he could | 6 |
|
| 3 | at [adj] he could [vb infin] | 10 |
|
| 4 | at [adj] he could [verb] | 10 |
|
| 5 | at [adj] he could [adv] | 8 |
|
| 6 | at [adj] he could not | 8 |
|
| 7 | at [adj] he could [not/n't] | 8 |
|
