| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [verb] [is] [vb infin] | 342 |
|
| 2 | [modal v] [verb] [is] for | 14 |
|
| 3 | [verb] [is] [vb infin] for | 13 |
|
| 4 | [modal v] [verb] [vb infin] for | 8 |
|
