| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [vb infin] for [adj] | 1397 |
|
| 2 | [modal v] [vb infin] [adj] year | 369 |
|
| 3 | [vb infin] for [adj] year | 115 |
|
| 4 | [modal v] [vb infin] for year | 45 |
|
