| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [verb] a | 37973 |
|
| 2 | [verb] at a | 7173 |
|
| 3 | [modal v] [verb] at | 5235 |
|
| 4 | [modal v] at a | 14 |
|
