| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [vb infin] a few weeks | 8 |
|
| 2 | [vb mod] [vb infin] a few weeks | 8 |
|
| 3 | [vb infin] [prep] a few weeks | 13 |
|
| 4 | [vb infin] [prep] a few weeks | 13 |
|
