| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [to-vb] [adv] | 1880 |
|
| 2 | [modal v] [to-vb] [adv] | 1880 |
|
| 3 | used [to-vb] [adv] | 1521 |
|
| 4 | used [verb] [adv] | 1521 |
|
