| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [modal v] [vb infin] [prep] | 3559 |
|
| 2 | [adj] period [modal v] [vb infin] | 65 |
|
| 3 | period [modal v] [vb infin] [prep] | 23 |
|
