| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] he could [adv] | 467 |
|
| 2 | [subord] he could [adv] | 175 |
|
| 3 | when [pron] could [adv] | 56 |
|
| 4 | when he could [adv] | 43 |
|
| 5 | when he [modal v] [adv] | 29 |
|
| 6 | when he could [adv] | 18 |
|
