| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [modal v] [vb infin] for a period | 6 |
|
| 2 | [noun sg] [modal v] [vb infin] for a period | 5 |
|
| 3 | [modal v] [vb infin] for a [adj] period | 16 |
|
| 4 | [modal v] [vb infin] for a [adj] period | 15 |
|
| 5 | [modal v] [vb infin] for a period [prep] | 5 |
|
| 6 | [modal v] [vb infin] for a period [prep] | 5 |
|
