| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [verb] [is] [vb infin] [prep] | 45 |
|
| 2 | [modal v] [verb] [be] [vb infin] for | 7 |
|
| 3 | [modal v] [verb] [is] [verb] for | 6 |
|
