| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [to-vb] [prep] [art] [unc] | 11 |
|
| 2 | used [verb] [prep] [art] [unc] | 10 |
|
| 3 | used [to-vb] [prep] [art] [unc] | 10 |
|
