| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] [adj] [modal v] [vb infin] | 369 |
|
| 2 | [adj] period [modal v] [vb infin] | 65 |
|
| 3 | [det] period [modal v] [vb infin] | 29 |
|
| 4 | [det] [adj] period [modal v] | 8 |
|
