| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [vb mod] to be able [to-vb] | 7 |
|
| 2 | [adv] [modal v] to be able [to-vb] | 7 |
|
| 3 | [adv] used to be able [to-vb] | 5 |
|
| 4 | [adv] used to be able [to-vb] | 5 |
|
