| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] if he could not [vb infin] | 6 |
|
| 2 | [adv] if he could not [verb] | 6 |
|
| 3 | [adv] if he could not [verb] | 6 |
|
| 4 | even if he could not [verb] | 5 |
|
